public GenericDraweeHierarchyBuilder setRetryImage(
      Drawable retryDrawable, @Nullable ScalingUtils.ScaleType retryImageScaleType) {
    mRetryImage = retryDrawable;
    mRetryImageScaleType = retryImageScaleType;
    return this;
  }
Sets the retry image and its scale type.

@param retryDrawable drawable to be used as retry image
@param retryImageScaleType scale type for the retry image
@return modified instance of this builder
drawee/src/main/java/com/facebook/drawee/generic/GenericDraweeHierarchyBuilder.java