code: @SuppressWarnings("deprecation")
  	@SuppressLint("NewApi")
  	public SwipeBack setSwipeBackContainerBackgroundDrawable(Drawable d) {
  		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
  			mSwipeBackContainer.setBackgroundDrawable(d);
  		} else {
  			mSwipeBackContainer.setBackground(d);
  		}
  
  		return this;
  	}
docs: Set the background of the wipe swipe back view container (The container
  where the swipe back view is inflated into)
  
  @param d
  @return