code: void shift(final int height) {
          int shiftSize = isMovingUpwards() ? -height : height;
          mOriginalY += shiftSize;
          mDownY += shiftSize;
      }
docs: Shifts the original y coordinates of this {@code HoverDrawable} {code height} pixels upwards or downwards,
  depending on the move direction.
  
  @param height the number of pixels this {@code HoverDrawable} should be moved. Should be positive.