public GenericDraweeHierarchyBuilder setProgressBarImageScaleType(
      @Nullable ScalingUtils.ScaleType progressBarImageScaleType) {
    mProgressBarImageScaleType = progressBarImageScaleType;
    return this;
  }
Sets the progress bar image scale type.

<p>If not set, the default value CENTER_INSIDE will be used.

@param progressBarImageScaleType scale type for the progress bar image
@return modified instance of this builder
drawee/src/main/java/com/facebook/drawee/generic/GenericDraweeHierarchyBuilder.java