code: public GenericDraweeHierarchyBuilder setPlaceholderImage(
        int resourceId, @Nullable ScalingUtils.ScaleType placeholderImageScaleType) {
      mPlaceholderImage = mResources.getDrawable(resourceId);
      mPlaceholderImageScaleType = placeholderImageScaleType;
      return this;
    }
docs: Sets the placeholder image and its scale type.
  
  @param resourceId an identifier of an Android drawable or color resource
  @param placeholderImageScaleType scale type for the placeholder image
  @return modified instance of this builder