private Extras obtainExtras(
      @Nullable DataSource<T> datasource, @Nullable INFO info, @Nullable Uri mainUri) {
    return obtainExtras(
        datasource == null ? null : datasource.getExtras(), obtainExtrasFromImage(info), mainUri);
  }
Returns whether the gesture should be handled by the controller
drawee/src/main/java/com/facebook/drawee/controller/AbstractDraweeController.java