public boolean onTouchEvent(MotionEvent event) {
    for (int i = 0; i < mHolders.size(); ++i) {
      if (mHolders.get(i).onTouchEvent(event)) {
        return true;
      }
    }
    return false;
  }
Releases resources used to display the image.

<p>The containing view must call this method from both {@link View#onStartTemporaryDetach()}
and {@link View#onDetachedFromWindow()}.
drawee/src/main/java/com/facebook/drawee/view/MultiDraweeHolder.java