public DraweeHolder<DH> get(int index) {
    return mHolders.get(index);
  }
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