diff --git a/Android.bp b/Android.bp
index b3027bc..0a55675 100644
--- a/Android.bp
+++ b/Android.bp
@@ -228,7 +228,7 @@
     ],
 }
 
-// Common source files used to build go launcher
+// Common source files used to build go launcher except go/src files
 filegroup {
     name: "launcher-go-src-no-build-config",
     srcs: [
@@ -236,8 +236,6 @@
         "src/**/*.kt",
         "quickstep/src/**/*.java",
         "quickstep/src/**/*.kt",
-        "go/src/**/*.java",
-        "go/src/**/*.kt",
         "go/quickstep/src/**/*.java",
         "go/quickstep/src/**/*.kt",
     ],
diff --git a/go/src/com/android/launcher3/util/AbsGridOccupancy.java b/go/src/com/android/launcher3/util/AbsGridOccupancy.java
new file mode 100644
index 0000000..4a46bd1
--- /dev/null
+++ b/go/src/com/android/launcher3/util/AbsGridOccupancy.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.util;
+
+/**
+ * Defines method to find the next vacant cell on a grid.
+ * This uses the default top-down, left-right approach and can be over-written through
+ * code swaps in different launchers.
+ */
+public abstract class AbsGridOccupancy {
+
+    /**
+     * Find the first vacant cell, if there is one.
+     *
+     * @param vacantOut Holds the x and y coordinate of the vacant cell
+     * @param spanX Horizontal cell span.
+     * @param spanY Vertical cell span.
+     *
+     * @return true if a vacant cell was found
+     */
+    protected boolean findVacantCell(int[] vacantOut, boolean[][] cells, int countX, int countY,
+            int spanX, int spanY) {
+        for (int y = 0; (y + spanY) <= countY; y++) {
+            for (int x = 0; (x + spanX) <= countX; x++) {
+                boolean available = !cells[x][y];
+                out:
+                for (int i = x; i < x + spanX; i++) {
+                    for (int j = y; j < y + spanY; j++) {
+                        available = available && !cells[i][j];
+                        if (!available) break out;
+                    }
+                }
+                if (available) {
+                    vacantOut[0] = x;
+                    vacantOut[1] = y;
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+}
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 923e614..eda834e 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -3234,12 +3234,12 @@
     /** Pauses view updates that should not be run during the app launch animation. */
     public void pauseExpensiveViewUpdates() {
         // Pause page indicator animations as they lead to layer trashing.
-        mWorkspace.getPageIndicator().pauseAnimations();
+        getWorkspace().getPageIndicator().pauseAnimations();
     }
 
     /** Resumes view updates at the end of the app launch animation. */
     public void resumeExpensiveViewUpdates() {
-        mWorkspace.getPageIndicator().skipAnimationsToEnd();
+        getWorkspace().getPageIndicator().skipAnimationsToEnd();
     }
 
 }
diff --git a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
index 3dfece7..a11bd4f 100644
--- a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
+++ b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
@@ -23,7 +23,6 @@
 import static com.android.launcher3.LauncherSettings.Favorites.CONTAINER_HOTSEAT_PREDICTION;
 import static com.android.launcher3.model.ModelUtils.filterCurrentWorkspaceItems;
 import static com.android.launcher3.model.ModelUtils.getMissingHotseatRanks;
-import static com.android.launcher3.model.ModelUtils.sortWorkspaceItemsSpatially;
 
 import android.annotation.TargetApi;
 import android.app.Fragment;
@@ -420,8 +419,6 @@
                 currentWorkspaceItems, otherWorkspaceItems);
         filterCurrentWorkspaceItems(currentScreenIds, dataModel.appWidgets, currentAppWidgets,
                 otherAppWidgets);
-
-        sortWorkspaceItemsSpatially(mIdp, currentWorkspaceItems);
         for (ItemInfo itemInfo : currentWorkspaceItems) {
             switch (itemInfo.itemType) {
                 case Favorites.ITEM_TYPE_APPLICATION:
diff --git a/src/com/android/launcher3/model/BaseLoaderResults.java b/src/com/android/launcher3/model/BaseLoaderResults.java
index 5b278ab..6c4cfb9 100644
--- a/src/com/android/launcher3/model/BaseLoaderResults.java
+++ b/src/com/android/launcher3/model/BaseLoaderResults.java
@@ -18,7 +18,6 @@
 
 import static com.android.launcher3.model.ItemInstallQueue.FLAG_LOADER_RUNNING;
 import static com.android.launcher3.model.ModelUtils.filterCurrentWorkspaceItems;
-import static com.android.launcher3.model.ModelUtils.sortWorkspaceItemsSpatially;
 import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
 
 import android.os.Process;
@@ -27,6 +26,8 @@
 import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherModel.CallbackTask;
+import com.android.launcher3.LauncherSettings;
+import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.model.BgDataModel.Callbacks;
 import com.android.launcher3.model.BgDataModel.FixedContainerItems;
 import com.android.launcher3.model.data.AppInfo;
@@ -110,6 +111,42 @@
 
     public abstract void bindWidgets();
 
+    /**
+     * Sorts the set of items by hotseat, workspace (spatially from top to bottom, left to right)
+     */
+    protected void sortWorkspaceItemsSpatially(InvariantDeviceProfile profile,
+            ArrayList<ItemInfo> workspaceItems) {
+        final int screenCols = profile.numColumns;
+        final int screenCellCount = profile.numColumns * profile.numRows;
+        Collections.sort(workspaceItems, (lhs, rhs) -> {
+            if (lhs.container == rhs.container) {
+                // Within containers, order by their spatial position in that container
+                switch (lhs.container) {
+                    case LauncherSettings.Favorites.CONTAINER_DESKTOP: {
+                        int lr = (lhs.screenId * screenCellCount + lhs.cellY * screenCols
+                                + lhs.cellX);
+                        int rr = (rhs.screenId * screenCellCount + +rhs.cellY * screenCols
+                                + rhs.cellX);
+                        return Integer.compare(lr, rr);
+                    }
+                    case LauncherSettings.Favorites.CONTAINER_HOTSEAT: {
+                        // We currently use the screen id as the rank
+                        return Integer.compare(lhs.screenId, rhs.screenId);
+                    }
+                    default:
+                        if (FeatureFlags.IS_STUDIO_BUILD) {
+                            throw new RuntimeException(
+                                    "Unexpected container type when sorting workspace items.");
+                        }
+                        return 0;
+                }
+            } else {
+                // Between containers, order by hotseat, desktop
+                return Integer.compare(lhs.container, rhs.container);
+            }
+        });
+    }
+
     protected void executeCallbacksTask(CallbackTask task, Executor executor) {
         executor.execute(() -> {
             if (mMyBindingId != mBgDataModel.lastBindId) {
@@ -131,7 +168,7 @@
         return idleLock;
     }
 
-    private static class WorkspaceBinder {
+    private class WorkspaceBinder {
 
         private final Executor mUiExecutor;
         private final Callbacks mCallbacks;
diff --git a/src/com/android/launcher3/model/ModelUtils.java b/src/com/android/launcher3/model/ModelUtils.java
index ef5eef1..df6768d 100644
--- a/src/com/android/launcher3/model/ModelUtils.java
+++ b/src/com/android/launcher3/model/ModelUtils.java
@@ -23,10 +23,8 @@
 import android.os.Process;
 import android.util.Log;
 
-import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.Utilities;
-import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.icons.BitmapInfo;
 import com.android.launcher3.icons.LauncherIcons;
 import com.android.launcher3.model.data.ItemInfo;
@@ -92,42 +90,6 @@
     }
 
     /**
-     * Sorts the set of items by hotseat, workspace (spatially from top to bottom, left to right)
-     */
-    public static void sortWorkspaceItemsSpatially(InvariantDeviceProfile profile,
-            ArrayList<ItemInfo> workspaceItems) {
-        final int screenCols = profile.numColumns;
-        final int screenCellCount = profile.numColumns * profile.numRows;
-        Collections.sort(workspaceItems, (lhs, rhs) -> {
-            if (lhs.container == rhs.container) {
-                // Within containers, order by their spatial position in that container
-                switch (lhs.container) {
-                    case LauncherSettings.Favorites.CONTAINER_DESKTOP: {
-                        int lr = (lhs.screenId * screenCellCount + lhs.cellY * screenCols
-                                + lhs.cellX);
-                        int rr = (rhs.screenId * screenCellCount + +rhs.cellY * screenCols
-                                + rhs.cellX);
-                        return Integer.compare(lr, rr);
-                    }
-                    case LauncherSettings.Favorites.CONTAINER_HOTSEAT: {
-                        // We currently use the screen id as the rank
-                        return Integer.compare(lhs.screenId, rhs.screenId);
-                    }
-                    default:
-                        if (FeatureFlags.IS_STUDIO_BUILD) {
-                            throw new RuntimeException(
-                                    "Unexpected container type when sorting workspace items.");
-                        }
-                        return 0;
-                }
-            } else {
-                // Between containers, order by hotseat, desktop
-                return Integer.compare(lhs.container, rhs.container);
-            }
-        });
-    }
-
-    /**
      * Iterates though current workspace items and returns available hotseat ranks for prediction.
      */
     public static IntArray getMissingHotseatRanks(List<ItemInfo> items, int len) {
diff --git a/src/com/android/launcher3/util/GridOccupancy.java b/src/com/android/launcher3/util/GridOccupancy.java
index 9c752a7..1301460 100644
--- a/src/com/android/launcher3/util/GridOccupancy.java
+++ b/src/com/android/launcher3/util/GridOccupancy.java
@@ -7,7 +7,7 @@
 /**
  * Utility object to manage the occupancy in a grid.
  */
-public class GridOccupancy {
+public class GridOccupancy extends AbsGridOccupancy {
 
     private final int mCountX;
     private final int mCountY;
@@ -30,24 +30,7 @@
      * @return true if a vacant cell was found
      */
     public boolean findVacantCell(int[] vacantOut, int spanX, int spanY) {
-        for (int y = 0; (y + spanY) <= mCountY; y++) {
-            for (int x = 0; (x + spanX) <= mCountX; x++) {
-                boolean available = !cells[x][y];
-                out:
-                for (int i = x; i < x + spanX; i++) {
-                    for (int j = y; j < y + spanY; j++) {
-                        available = available && !cells[i][j];
-                        if (!available) break out;
-                    }
-                }
-                if (available) {
-                    vacantOut[0] = x;
-                    vacantOut[1] = y;
-                    return true;
-                }
-            }
-        }
-        return false;
+        return super.findVacantCell(vacantOut, cells, mCountX, mCountY, spanX, spanY);
     }
 
     public void copyTo(GridOccupancy dest) {
diff --git a/src_shortcuts_overrides/com/android/launcher3/util/AbsGridOccupancy.java b/src_shortcuts_overrides/com/android/launcher3/util/AbsGridOccupancy.java
new file mode 100644
index 0000000..968b281
--- /dev/null
+++ b/src_shortcuts_overrides/com/android/launcher3/util/AbsGridOccupancy.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.util;
+
+/**
+ * Defines method to find the next vacant cell on a grid.
+ * This uses the default top-down, left-right approach and can be over-written through
+ * code swaps in different launchers.
+ */
+public abstract class AbsGridOccupancy {
+    /**
+     * Find the first vacant cell, if there is one.
+     *
+     * @param vacantOut Holds the x and y coordinate of the vacant cell
+     * @param spanX Horizontal cell span.
+     * @param spanY Vertical cell span.
+     *
+     * @return true if a vacant cell was found
+     */
+    protected boolean findVacantCell(int[] vacantOut, boolean[][] cells, int countX, int countY,
+            int spanX, int spanY) {
+        for (int y = 0; (y + spanY) <= countY; y++) {
+            for (int x = 0; (x + spanX) <= countX; x++) {
+                boolean available = !cells[x][y];
+                out:
+                for (int i = x; i < x + spanX; i++) {
+                    for (int j = y; j < y + spanY; j++) {
+                        available = available && !cells[i][j];
+                        if (!available) break out;
+                    }
+                }
+                if (available) {
+                    vacantOut[0] = x;
+                    vacantOut[1] = y;
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+}