docs: private void setImageOrPlaceholder(ImageView iv, ImageHolder imageHolder) {
          //cancel previous started image loading processes
          DrawerImageLoader.getInstance().cancelImage(iv);
          //set the placeholder
          iv.setImageDrawable(DrawerImageLoader.getInstance().getImageLoader().placeholder(iv.getContext(), DrawerImageLoader.Tags.PROFILE.name()));
          //set the real image (probably also the uri)
          ImageHolder.applyTo(imageHolder, iv, DrawerImageLoader.Tags.PROFILE.name());
      }