content: /*
   * Copyright (C) 2018 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.quickstep;
  
  import android.content.Context;
  
  import com.android.launcher3.R;
  import com.android.launcher3.util.Preconditions;
  import com.android.launcher3.util.ResourceBasedOverride;
  
  /**
   * Callbacks related to overview/quicksteps.
   */
  public class OverviewCallbacks implements ResourceBasedOverride {
  
      private static OverviewCallbacks sInstance;
  
      public static OverviewCallbacks get(Context context) {
          Preconditions.assertUIThread();
          if (sInstance == null) {
              sInstance = Overrides.getObject(OverviewCallbacks.class,
                      context.getApplicationContext(), R.string.overview_callbacks_class);
          }
          return sInstance;
      }
  
      public void onInitOverviewTransition() { }
  
      public void closeAllWindows() { }
  }
  