public GenericDraweeHierarchyBuilder setActualImageScaleType(
      @Nullable ScalingUtils.ScaleType actualImageScaleType) {
    mActualImageScaleType = actualImageScaleType;
    mActualImageMatrix = null;
    return this;
  }
Sets the scale type for the actual image.

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

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