@Override
  public void setFilterBitmap(boolean filterBitmap) {
    mDrawableProperties.setFilterBitmap(filterBitmap);
    for (int i = 0; i < mLayers.length; i++) {
      Drawable drawable = mLayers[i];
      if (drawable != null) {
        drawable.setFilterBitmap(filterBitmap);
      }
    }
  }
Sets a new drawable at the specified index, and return the previous drawable, if any.
drawee/src/main/java/com/facebook/drawee/drawable/ArrayDrawable.java