diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OverviewWithoutFocusInputConsumer.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OverviewWithoutFocusInputConsumer.java
index d972c0f..1c77a05 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OverviewWithoutFocusInputConsumer.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OverviewWithoutFocusInputConsumer.java
@@ -19,7 +19,6 @@
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_HOME_GESTURE;
 
 import android.content.Context;
-import android.content.Intent;
 import android.graphics.PointF;
 import android.view.MotionEvent;
 
@@ -80,9 +79,7 @@
 
     @Override
     public void onSwipeUp(boolean wasFling, PointF finalVelocity) {
-        mContext.startActivity(new Intent(Intent.ACTION_MAIN)
-                .addCategory(Intent.CATEGORY_HOME)
-                .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
+        mContext.startActivity(mGestureState.getHomeIntent());
         ActiveGestureLog.INSTANCE.addLog("startQuickstep");
         BaseActivity activity = BaseDraggingActivity.fromContext(mContext);
         int pageIndex = -1; // This number doesn't reflect workspace page index.
diff --git a/src/com/android/launcher3/LauncherModel.java b/src/com/android/launcher3/LauncherModel.java
index f434c91..ff4b545 100644
--- a/src/com/android/launcher3/LauncherModel.java
+++ b/src/com/android/launcher3/LauncherModel.java
@@ -58,7 +58,7 @@
 import com.android.launcher3.pm.PackageInstallInfo;
 import com.android.launcher3.pm.UserCache;
 import com.android.launcher3.shortcuts.ShortcutRequest;
-import com.android.launcher3.util.IntSparseArrayMap;
+import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.launcher3.util.LooperExecutor;
 import com.android.launcher3.util.PackageUserKey;
@@ -410,7 +410,7 @@
         enqueueModelUpdateTask(new BaseModelUpdateTask() {
             @Override
             public void execute(LauncherAppState app, BgDataModel dataModel, AllAppsList apps) {
-                final IntSparseArrayMap<Boolean> removedIds = new IntSparseArrayMap<>();
+                final IntSet removedIds = new IntSet();
                 synchronized (dataModel) {
                     for (ItemInfo info : dataModel.itemsIdMap) {
                         if (info instanceof WorkspaceItemInfo
@@ -418,13 +418,13 @@
                                 && user.equals(info.user)
                                 && info.getIntent() != null
                                 && TextUtils.equals(packageName, info.getIntent().getPackage())) {
-                            removedIds.put(info.id, true /* remove */);
+                            removedIds.add(info.id);
                         }
                     }
                 }
 
                 if (!removedIds.isEmpty()) {
-                    deleteAndBindComponentsRemoved(ItemInfoMatcher.ofItemIds(removedIds, false));
+                    deleteAndBindComponentsRemoved(ItemInfoMatcher.ofItemIds(removedIds));
                 }
             }
         });
diff --git a/src/com/android/launcher3/allapps/AllAppsContainerView.java b/src/com/android/launcher3/allapps/AllAppsContainerView.java
index c989e7b..77b8a32 100644
--- a/src/com/android/launcher3/allapps/AllAppsContainerView.java
+++ b/src/com/android/launcher3/allapps/AllAppsContainerView.java
@@ -83,7 +83,7 @@
     protected final BaseDraggingActivity mLauncher;
     protected final AdapterHolder[] mAH;
     private final ItemInfoMatcher mPersonalMatcher = ItemInfoMatcher.ofUser(Process.myUserHandle());
-    private final ItemInfoMatcher mWorkMatcher = ItemInfoMatcher.not(mPersonalMatcher);
+    private final ItemInfoMatcher mWorkMatcher = mPersonalMatcher.negate();
     private final AllAppsStore mAllAppsStore = new AllAppsStore();
 
     private final Paint mNavBarScrimPaint;
diff --git a/src/com/android/launcher3/model/BgDataModel.java b/src/com/android/launcher3/model/BgDataModel.java
index 9bef847..7524920 100644
--- a/src/com/android/launcher3/model/BgDataModel.java
+++ b/src/com/android/launcher3/model/BgDataModel.java
@@ -56,6 +56,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.function.BiConsumer;
+import java.util.function.Consumer;
 import java.util.stream.Collectors;
 
 /**
@@ -348,6 +349,19 @@
         }
     }
 
+    /**
+     * Calls the provided {@code op} for all workspaceItems in the in-memory model (both persisted
+     * items and dynamic/predicted items for the provided {@code userHandle}.
+     * Note the call is not synchronized over the model, that should be handled by the called.
+     */
+    public void forAllWorkspaceItemInfos(UserHandle userHandle, Consumer<WorkspaceItemInfo> op) {
+        for (ItemInfo info : itemsIdMap) {
+            if (info instanceof WorkspaceItemInfo && userHandle.equals(info.user)) {
+                op.accept((WorkspaceItemInfo) info);
+            }
+        }
+    }
+
     public interface Callbacks {
         // If the launcher has permission to access deep shortcuts.
         int FLAG_HAS_SHORTCUT_PERMISSION = 1 << 0;
diff --git a/src/com/android/launcher3/model/CacheDataUpdatedTask.java b/src/com/android/launcher3/model/CacheDataUpdatedTask.java
index 8e6b064..f644d49 100644
--- a/src/com/android/launcher3/model/CacheDataUpdatedTask.java
+++ b/src/com/android/launcher3/model/CacheDataUpdatedTask.java
@@ -21,7 +21,6 @@
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.icons.IconCache;
-import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
 
 import java.util.ArrayList;
@@ -48,23 +47,18 @@
     @Override
     public void execute(LauncherAppState app, BgDataModel dataModel, AllAppsList apps) {
         IconCache iconCache = app.getIconCache();
-
-
         ArrayList<WorkspaceItemInfo> updatedShortcuts = new ArrayList<>();
 
         synchronized (dataModel) {
-            for (ItemInfo info : dataModel.itemsIdMap) {
-                if (info instanceof WorkspaceItemInfo && mUser.equals(info.user)) {
-                    WorkspaceItemInfo si = (WorkspaceItemInfo) info;
-                    ComponentName cn = si.getTargetComponent();
-                    if (si.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION
-                            && isValidShortcut(si) && cn != null
-                            && mPackages.contains(cn.getPackageName())) {
-                        iconCache.getTitleAndIcon(si, si.usingLowResIcon());
-                        updatedShortcuts.add(si);
-                    }
+            dataModel.forAllWorkspaceItemInfos(mUser, si -> {
+                ComponentName cn = si.getTargetComponent();
+                if (si.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION
+                        && isValidShortcut(si) && cn != null
+                        && mPackages.contains(cn.getPackageName())) {
+                    iconCache.getTitleAndIcon(si, si.usingLowResIcon());
+                    updatedShortcuts.add(si);
                 }
-            }
+            });
             apps.updateIconsAndLabels(mPackages, mUser);
         }
         bindUpdatedWorkspaceItems(updatedShortcuts);
diff --git a/src/com/android/launcher3/model/PackageInstallStateChangedTask.java b/src/com/android/launcher3/model/PackageInstallStateChangedTask.java
index 203f1ca..8369c48 100644
--- a/src/com/android/launcher3/model/PackageInstallStateChangedTask.java
+++ b/src/com/android/launcher3/model/PackageInstallStateChangedTask.java
@@ -20,8 +20,6 @@
 import android.content.pm.PackageManager;
 
 import com.android.launcher3.LauncherAppState;
-import com.android.launcher3.LauncherModel.CallbackTask;
-import com.android.launcher3.model.BgDataModel.Callbacks;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.LauncherAppWidgetInfo;
 import com.android.launcher3.model.data.PromiseAppInfo;
@@ -70,21 +68,18 @@
 
         synchronized (dataModel) {
             final HashSet<ItemInfo> updates = new HashSet<>();
-            for (ItemInfo info : dataModel.itemsIdMap) {
-                if (info instanceof WorkspaceItemInfo) {
-                    WorkspaceItemInfo si = (WorkspaceItemInfo) info;
-                    ComponentName cn = si.getTargetComponent();
-                    if (si.hasPromiseIconUi() && (cn != null)
-                            && mInstallInfo.packageName.equals(cn.getPackageName())) {
-                        si.setInstallProgress(mInstallInfo.progress);
-                        if (mInstallInfo.state == PackageInstallInfo.STATUS_FAILED) {
-                            // Mark this info as broken.
-                            si.status &= ~WorkspaceItemInfo.FLAG_INSTALL_SESSION_ACTIVE;
-                        }
-                        updates.add(si);
+            dataModel.forAllWorkspaceItemInfos(mInstallInfo.user, si -> {
+                ComponentName cn = si.getTargetComponent();
+                if (si.hasPromiseIconUi() && (cn != null)
+                        && mInstallInfo.packageName.equals(cn.getPackageName())) {
+                    si.setInstallProgress(mInstallInfo.progress);
+                    if (mInstallInfo.state == PackageInstallInfo.STATUS_FAILED) {
+                        // Mark this info as broken.
+                        si.status &= ~WorkspaceItemInfo.FLAG_INSTALL_SESSION_ACTIVE;
                     }
+                    updates.add(si);
                 }
-            }
+            });
 
             for (LauncherAppWidgetInfo widget : dataModel.appWidgets) {
                 if (widget.providerName.getPackageName().equals(mInstallInfo.packageName)) {
@@ -94,12 +89,7 @@
             }
 
             if (!updates.isEmpty()) {
-                scheduleCallbackTask(new CallbackTask() {
-                    @Override
-                    public void execute(Callbacks callbacks) {
-                        callbacks.bindRestoreItemsChange(updates);
-                    }
-                });
+                scheduleCallbackTask(callbacks -> callbacks.bindRestoreItemsChange(updates));
             }
         }
     }
diff --git a/src/com/android/launcher3/model/PackageUpdatedTask.java b/src/com/android/launcher3/model/PackageUpdatedTask.java
index 7cd467e..dca4ec0 100644
--- a/src/com/android/launcher3/model/PackageUpdatedTask.java
+++ b/src/com/android/launcher3/model/PackageUpdatedTask.java
@@ -45,7 +45,7 @@
 import com.android.launcher3.pm.UserCache;
 import com.android.launcher3.shortcuts.ShortcutRequest;
 import com.android.launcher3.util.FlagOp;
-import com.android.launcher3.util.IntSparseArrayMap;
+import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.launcher3.util.PackageManagerHelper;
 import com.android.launcher3.util.PackageUserKey;
@@ -92,9 +92,11 @@
 
         final String[] packages = mPackages;
         final int N = packages.length;
-        FlagOp flagOp = FlagOp.NO_OP;
+        final FlagOp flagOp;
         final HashSet<String> packageSet = new HashSet<>(Arrays.asList(packages));
-        ItemInfoMatcher matcher = ItemInfoMatcher.ofPackages(packageSet, mUser);
+        final ItemInfoMatcher matcher = mOp == OP_USER_AVAILABILITY_CHANGE
+                ? ItemInfoMatcher.ofUser(mUser) // We want to update all packages for this user
+                : ItemInfoMatcher.ofPackages(packageSet, mUser);
         final HashSet<ComponentName> removedComponents = new HashSet<>();
 
         switch (mOp) {
@@ -158,19 +160,22 @@
                 flagOp = ums.isUserQuiet(mUser)
                         ? FlagOp.addFlag(WorkspaceItemInfo.FLAG_DISABLED_QUIET_USER)
                         : FlagOp.removeFlag(WorkspaceItemInfo.FLAG_DISABLED_QUIET_USER);
-                // We want to update all packages for this user.
-                matcher = ItemInfoMatcher.ofUser(mUser);
                 appsList.updateDisabledFlags(matcher, flagOp);
 
                 // We are not synchronizing here, as int operations are atomic
                 appsList.setFlags(FLAG_QUIET_MODE_ENABLED, ums.isAnyProfileQuietModeEnabled());
                 break;
             }
+            default:
+                flagOp = FlagOp.NO_OP;
+                break;
         }
 
         bindApplicationsIfNeeded();
 
-        final IntSparseArrayMap<Boolean> removedShortcuts = new IntSparseArrayMap<>();
+        final IntSet removedShortcuts = new IntSet();
+        // Shortcuts to keep even if the corresponding app was removed
+        final IntSet forceKeepShortcuts = new IntSet();
 
         // Update shortcut infos
         if (mOp == OP_ADD || flagOp != FlagOp.NO_OP) {
@@ -180,118 +185,118 @@
             // For system apps, package manager send OP_UPDATE when an app is enabled.
             final boolean isNewApkAvailable = mOp == OP_ADD || mOp == OP_UPDATE;
             synchronized (dataModel) {
-                for (ItemInfo info : dataModel.itemsIdMap) {
-                    if (info instanceof WorkspaceItemInfo && mUser.equals(info.user)) {
-                        WorkspaceItemInfo si = (WorkspaceItemInfo) info;
-                        boolean infoUpdated = false;
-                        boolean shortcutUpdated = false;
+                dataModel.forAllWorkspaceItemInfos(mUser, si -> {
 
-                        // Update shortcuts which use iconResource.
-                        if ((si.iconResource != null)
-                                && packageSet.contains(si.iconResource.packageName)) {
-                            LauncherIcons li = LauncherIcons.obtain(context);
-                            BitmapInfo iconInfo = li.createIconBitmap(si.iconResource);
-                            li.recycle();
-                            if (iconInfo != null) {
-                                si.bitmap = iconInfo;
-                                infoUpdated = true;
+                    boolean infoUpdated = false;
+                    boolean shortcutUpdated = false;
+
+                    // Update shortcuts which use iconResource.
+                    if ((si.iconResource != null)
+                            && packageSet.contains(si.iconResource.packageName)) {
+                        LauncherIcons li = LauncherIcons.obtain(context);
+                        BitmapInfo iconInfo = li.createIconBitmap(si.iconResource);
+                        li.recycle();
+                        if (iconInfo != null) {
+                            si.bitmap = iconInfo;
+                            infoUpdated = true;
+                        }
+                    }
+
+                    ComponentName cn = si.getTargetComponent();
+                    if (cn != null && matcher.matches(si, cn)) {
+                        String packageName = cn.getPackageName();
+
+                        if (si.hasStatusFlag(WorkspaceItemInfo.FLAG_SUPPORTS_WEB_UI)) {
+                            forceKeepShortcuts.add(si.id);
+                            if (mOp == OP_REMOVE) {
+                                return;
                             }
                         }
 
-                        ComponentName cn = si.getTargetComponent();
-                        if (cn != null && matcher.matches(si, cn)) {
-                            String packageName = cn.getPackageName();
-
-                            if (si.hasStatusFlag(WorkspaceItemInfo.FLAG_SUPPORTS_WEB_UI)) {
-                                removedShortcuts.put(si.id, false);
-                                if (mOp == OP_REMOVE) {
-                                    continue;
-                                }
-                            }
-
-                            if (si.isPromise() && isNewApkAvailable) {
-                                boolean isTargetValid = true;
-                                if (si.itemType == Favorites.ITEM_TYPE_DEEP_SHORTCUT) {
-                                    List<ShortcutInfo> shortcut =
-                                            new ShortcutRequest(context, mUser)
-                                                    .forPackage(cn.getPackageName(),
-                                                            si.getDeepShortcutId())
-                                                    .query(ShortcutRequest.PINNED);
-                                    if (shortcut.isEmpty()) {
-                                        isTargetValid = false;
-                                    } else {
-                                        si.updateFromDeepShortcutInfo(shortcut.get(0), context);
-                                        infoUpdated = true;
-                                    }
-                                } else if (!cn.getClassName().equals(IconCache.EMPTY_CLASS_NAME)) {
-                                    isTargetValid = context.getSystemService(LauncherApps.class)
-                                            .isActivityEnabled(cn, mUser);
-                                }
-                                if (si.hasStatusFlag(FLAG_RESTORED_ICON | FLAG_AUTOINSTALL_ICON)) {
-                                    if (updateWorkspaceItemIntent(context, si, packageName)) {
-                                        infoUpdated = true;
-                                    } else if (si.hasPromiseIconUi()) {
-                                        removedShortcuts.put(si.id, true);
-                                        continue;
-                                    }
-                                } else if (!isTargetValid) {
-                                    removedShortcuts.put(si.id, true);
-                                    FileLog.e(TAG, "Restored shortcut no longer valid "
-                                            + si.getIntent());
-                                    continue;
+                        if (si.isPromise() && isNewApkAvailable) {
+                            boolean isTargetValid = true;
+                            if (si.itemType == Favorites.ITEM_TYPE_DEEP_SHORTCUT) {
+                                List<ShortcutInfo> shortcut =
+                                        new ShortcutRequest(context, mUser)
+                                                .forPackage(cn.getPackageName(),
+                                                        si.getDeepShortcutId())
+                                                .query(ShortcutRequest.PINNED);
+                                if (shortcut.isEmpty()) {
+                                    isTargetValid = false;
                                 } else {
-                                    si.status = WorkspaceItemInfo.DEFAULT;
+                                    si.updateFromDeepShortcutInfo(shortcut.get(0), context);
                                     infoUpdated = true;
                                 }
-                            } else if (isNewApkAvailable && removedComponents.contains(cn)) {
+                            } else if (!cn.getClassName().equals(IconCache.EMPTY_CLASS_NAME)) {
+                                isTargetValid = context.getSystemService(LauncherApps.class)
+                                        .isActivityEnabled(cn, mUser);
+                            }
+                            if (si.hasStatusFlag(FLAG_RESTORED_ICON | FLAG_AUTOINSTALL_ICON)) {
                                 if (updateWorkspaceItemIntent(context, si, packageName)) {
                                     infoUpdated = true;
+                                } else if (si.hasPromiseIconUi()) {
+                                    removedShortcuts.add(si.id);
+                                    return;
                                 }
-                            }
-
-                            if (isNewApkAvailable &&
-                                    si.itemType == Favorites.ITEM_TYPE_APPLICATION) {
-                                iconCache.getTitleAndIcon(si, si.usingLowResIcon());
+                            } else if (!isTargetValid) {
+                                removedShortcuts.add(si.id);
+                                FileLog.e(TAG, "Restored shortcut no longer valid "
+                                        + si.getIntent());
+                                return;
+                            } else {
+                                si.status = WorkspaceItemInfo.DEFAULT;
                                 infoUpdated = true;
                             }
-
-                            int oldRuntimeFlags = si.runtimeStatusFlags;
-                            si.runtimeStatusFlags = flagOp.apply(si.runtimeStatusFlags);
-                            if (si.runtimeStatusFlags != oldRuntimeFlags) {
-                                shortcutUpdated = true;
+                        } else if (isNewApkAvailable && removedComponents.contains(cn)) {
+                            if (updateWorkspaceItemIntent(context, si, packageName)) {
+                                infoUpdated = true;
                             }
                         }
 
-                        if (infoUpdated || shortcutUpdated) {
-                            updatedWorkspaceItems.add(si);
+                        if (isNewApkAvailable
+                                && si.itemType == Favorites.ITEM_TYPE_APPLICATION) {
+                            iconCache.getTitleAndIcon(si, si.usingLowResIcon());
+                            infoUpdated = true;
                         }
-                        if (infoUpdated) {
-                            getModelWriter().updateItemInDatabase(si);
-                        }
-                    } else if (info instanceof LauncherAppWidgetInfo && isNewApkAvailable) {
-                        LauncherAppWidgetInfo widgetInfo = (LauncherAppWidgetInfo) info;
-                        if (mUser.equals(widgetInfo.user)
-                                && widgetInfo.hasRestoreFlag(LauncherAppWidgetInfo.FLAG_PROVIDER_NOT_READY)
-                                && packageSet.contains(widgetInfo.providerName.getPackageName())) {
-                            widgetInfo.restoreStatus &=
-                                    ~LauncherAppWidgetInfo.FLAG_PROVIDER_NOT_READY &
-                                            ~LauncherAppWidgetInfo.FLAG_RESTORE_STARTED;
 
-                            // adding this flag ensures that launcher shows 'click to setup'
-                            // if the widget has a config activity. In case there is no config
-                            // activity, it will be marked as 'restored' during bind.
-                            widgetInfo.restoreStatus |= LauncherAppWidgetInfo.FLAG_UI_NOT_READY;
-
-                            widgets.add(widgetInfo);
-                            getModelWriter().updateItemInDatabase(widgetInfo);
+                        int oldRuntimeFlags = si.runtimeStatusFlags;
+                        si.runtimeStatusFlags = flagOp.apply(si.runtimeStatusFlags);
+                        if (si.runtimeStatusFlags != oldRuntimeFlags) {
+                            shortcutUpdated = true;
                         }
                     }
+
+                    if (infoUpdated || shortcutUpdated) {
+                        updatedWorkspaceItems.add(si);
+                    }
+                    if (infoUpdated && si.id != ItemInfo.NO_ID) {
+                        getModelWriter().updateItemInDatabase(si);
+                    }
+                });
+
+                for (LauncherAppWidgetInfo widgetInfo : dataModel.appWidgets) {
+                    if (mUser.equals(widgetInfo.user)
+                            && widgetInfo.hasRestoreFlag(
+                                    LauncherAppWidgetInfo.FLAG_PROVIDER_NOT_READY)
+                            && packageSet.contains(widgetInfo.providerName.getPackageName())) {
+                        widgetInfo.restoreStatus &=
+                                ~LauncherAppWidgetInfo.FLAG_PROVIDER_NOT_READY
+                                        & ~LauncherAppWidgetInfo.FLAG_RESTORE_STARTED;
+
+                        // adding this flag ensures that launcher shows 'click to setup'
+                        // if the widget has a config activity. In case there is no config
+                        // activity, it will be marked as 'restored' during bind.
+                        widgetInfo.restoreStatus |= LauncherAppWidgetInfo.FLAG_UI_NOT_READY;
+
+                        widgets.add(widgetInfo);
+                        getModelWriter().updateItemInDatabase(widgetInfo);
+                    }
                 }
             }
 
             bindUpdatedWorkspaceItems(updatedWorkspaceItems);
             if (!removedShortcuts.isEmpty()) {
-                deleteAndBindComponentsRemoved(ItemInfoMatcher.ofItemIds(removedShortcuts, false));
+                deleteAndBindComponentsRemoved(ItemInfoMatcher.ofItemIds(removedShortcuts));
             }
 
             if (!widgets.isEmpty()) {
@@ -319,7 +324,7 @@
         if (!removedPackages.isEmpty() || !removedComponents.isEmpty()) {
             ItemInfoMatcher removeMatch = ItemInfoMatcher.ofPackages(removedPackages, mUser)
                     .or(ItemInfoMatcher.ofComponents(removedComponents, mUser))
-                    .and(ItemInfoMatcher.ofItemIds(removedShortcuts, true));
+                    .and(ItemInfoMatcher.ofItemIds(forceKeepShortcuts).negate());
             deleteAndBindComponentsRemoved(removeMatch);
 
             // Remove any queued items from the install queue
diff --git a/src/com/android/launcher3/model/ShortcutsChangedTask.java b/src/com/android/launcher3/model/ShortcutsChangedTask.java
index 1cbe5c2..88006ba 100644
--- a/src/com/android/launcher3/model/ShortcutsChangedTask.java
+++ b/src/com/android/launcher3/model/ShortcutsChangedTask.java
@@ -21,7 +21,6 @@
 
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherSettings;
-import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
 import com.android.launcher3.shortcuts.ShortcutKey;
 import com.android.launcher3.shortcuts.ShortcutRequest;
@@ -58,14 +57,14 @@
         MultiHashMap<ShortcutKey, WorkspaceItemInfo> keyToShortcutInfo = new MultiHashMap<>();
         HashSet<String> allIds = new HashSet<>();
 
-        for (ItemInfo itemInfo : dataModel.itemsIdMap) {
-            if (itemInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT) {
-                WorkspaceItemInfo si = (WorkspaceItemInfo) itemInfo;
-                if (mPackageName.equals(si.getIntent().getPackage()) && si.user.equals(mUser)) {
+        synchronized (dataModel) {
+            dataModel.forAllWorkspaceItemInfos(mUser, si -> {
+                if ((si.itemType == LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT)
+                        && mPackageName.equals(si.getIntent().getPackage())) {
                     keyToShortcutInfo.addToList(ShortcutKey.fromItemInfo(si), si);
                     allIds.add(si.getDeepShortcutId());
                 }
-            }
+            });
         }
 
         final ArrayList<WorkspaceItemInfo> updatedWorkspaceItemInfos = new ArrayList<>();
diff --git a/src/com/android/launcher3/model/UserLockStateChangedTask.java b/src/com/android/launcher3/model/UserLockStateChangedTask.java
index 7ec884f..5048e13 100644
--- a/src/com/android/launcher3/model/UserLockStateChangedTask.java
+++ b/src/com/android/launcher3/model/UserLockStateChangedTask.java
@@ -23,7 +23,6 @@
 
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherSettings;
-import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
 import com.android.launcher3.shortcuts.ShortcutKey;
 import com.android.launcher3.shortcuts.ShortcutRequest;
@@ -73,27 +72,27 @@
         ArrayList<WorkspaceItemInfo> updatedWorkspaceItemInfos = new ArrayList<>();
         HashSet<ShortcutKey> removedKeys = new HashSet<>();
 
-        for (ItemInfo itemInfo : dataModel.itemsIdMap) {
-            if (itemInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT
-                    && mUser.equals(itemInfo.user)) {
-                WorkspaceItemInfo si = (WorkspaceItemInfo) itemInfo;
-                if (mIsUserUnlocked) {
-                    ShortcutKey key = ShortcutKey.fromItemInfo(si);
-                    ShortcutInfo shortcut = pinnedShortcuts.get(key);
-                    // We couldn't verify the shortcut during loader. If its no longer available
-                    // (probably due to clear data), delete the workspace item as well
-                    if (shortcut == null) {
-                        removedKeys.add(key);
-                        continue;
+        synchronized (dataModel) {
+            dataModel.forAllWorkspaceItemInfos(mUser, si -> {
+                if (si.itemType == LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT) {
+                    if (mIsUserUnlocked) {
+                        ShortcutKey key = ShortcutKey.fromItemInfo(si);
+                        ShortcutInfo shortcut = pinnedShortcuts.get(key);
+                        // We couldn't verify the shortcut during loader. If its no longer available
+                        // (probably due to clear data), delete the workspace item as well
+                        if (shortcut == null) {
+                            removedKeys.add(key);
+                            return;
+                        }
+                        si.runtimeStatusFlags &= ~FLAG_DISABLED_LOCKED_USER;
+                        si.updateFromDeepShortcutInfo(shortcut, context);
+                        app.getIconCache().getShortcutIcon(si, shortcut);
+                    } else {
+                        si.runtimeStatusFlags |= FLAG_DISABLED_LOCKED_USER;
                     }
-                    si.runtimeStatusFlags &= ~FLAG_DISABLED_LOCKED_USER;
-                    si.updateFromDeepShortcutInfo(shortcut, context);
-                    app.getIconCache().getShortcutIcon(si, shortcut);
-                } else {
-                    si.runtimeStatusFlags |= FLAG_DISABLED_LOCKED_USER;
+                    updatedWorkspaceItemInfos.add(si);
                 }
-                updatedWorkspaceItemInfos.add(si);
-            }
+            });
         }
         bindUpdatedWorkspaceItems(updatedWorkspaceItemInfos);
         if (!removedKeys.isEmpty()) {
diff --git a/src/com/android/launcher3/util/ItemInfoMatcher.java b/src/com/android/launcher3/util/ItemInfoMatcher.java
index 4d5405d..e98af35 100644
--- a/src/com/android/launcher3/util/ItemInfoMatcher.java
+++ b/src/com/android/launcher3/util/ItemInfoMatcher.java
@@ -81,11 +81,10 @@
     }
 
     /**
-     * Returns a new matcher which returns the opposite boolean value of the provided
-     * {@param matcher}.
+     * Returns a new matcher with returns the opposite value of this.
      */
-    static ItemInfoMatcher not(ItemInfoMatcher matcher) {
-        return (info, cn) -> !matcher.matches(info, cn);
+    default ItemInfoMatcher negate() {
+        return (info, cn) -> !matches(info, cn);
     }
 
     static ItemInfoMatcher ofUser(UserHandle user) {
@@ -105,7 +104,10 @@
                         keys.contains(ShortcutKey.fromItemInfo(info));
     }
 
-    static ItemInfoMatcher ofItemIds(IntSparseArrayMap<Boolean> ids, Boolean matchDefault) {
-        return (info, cn) -> ids.get(info.id, matchDefault);
+    /**
+     * Returns a matcher for items with provided ids
+     */
+    static ItemInfoMatcher ofItemIds(IntSet ids) {
+        return (info, cn) -> ids.contains(info.id);
     }
 }
diff --git a/src/com/android/launcher3/widget/WidgetsDiffReporter.java b/src/com/android/launcher3/widget/WidgetsDiffReporter.java
index df6e2c3..c9e80dc 100644
--- a/src/com/android/launcher3/widget/WidgetsDiffReporter.java
+++ b/src/com/android/launcher3/widget/WidgetsDiffReporter.java
@@ -20,8 +20,10 @@
 
 import androidx.recyclerview.widget.RecyclerView;
 
+import com.android.launcher3.Utilities;
 import com.android.launcher3.icons.IconCache;
 import com.android.launcher3.model.data.PackageItemInfo;
+import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.widget.WidgetsListAdapter.WidgetListRowEntryComparator;
 
 import java.util.ArrayList;
@@ -32,8 +34,8 @@
  * methods accordingly.
  */
 public class WidgetsDiffReporter {
-    private static final boolean DEBUG = false;
-    private static final String TAG = "WidgetsDiffReporter";
+    private static final boolean DEBUG = Utilities.IS_RUNNING_IN_TEST_HARNESS; // b/160238801
+    private static final String TAG = TestProtocol.NO_SCROLL_END_WIDGETS;
 
     private final IconCache mIconCache;
     private final RecyclerView.Adapter mListener;
diff --git a/src/com/android/launcher3/widget/WidgetsRecyclerView.java b/src/com/android/launcher3/widget/WidgetsRecyclerView.java
index 17baa27..8f81977 100644
--- a/src/com/android/launcher3/widget/WidgetsRecyclerView.java
+++ b/src/com/android/launcher3/widget/WidgetsRecyclerView.java
@@ -120,6 +120,9 @@
     public int getCurrentScrollY() {
         // Skip early if widgets are not bound.
         if (isModelNotReady() || getChildCount() == 0) {
+            if (Utilities.IS_RUNNING_IN_TEST_HARNESS) {
+                Log.d(TestProtocol.NO_SCROLL_END_WIDGETS, "getCurrentScrollY: -1");
+            }
             return -1;
         }
 
@@ -128,6 +131,10 @@
         int y = (child.getMeasuredHeight() * rowIndex);
         int offset = getLayoutManager().getDecoratedTop(child);
 
+        if (Utilities.IS_RUNNING_IN_TEST_HARNESS) {
+            Log.d(TestProtocol.NO_SCROLL_END_WIDGETS,
+                    "getCurrentScrollY: " + (getPaddingTop() + y - offset));
+        }
         return getPaddingTop() + y - offset;
     }