code: public static boolean applyTo(ImageHolder imageHolder, ImageView imageView, String tag) {
          if (imageHolder != null && imageView != null) {
              return imageHolder.applyTo(imageView, tag);
          }
          return false;
      }
docs: a small static helper to set the image from the imageHolder nullSave to the imageView
  
  @param imageHolder
  @param imageView
  @param tag         used to identify imageViews and define different placeholders
  @return true if an image was set