code: private long rotateMapHeight(long width, long height) {
      if (rotation != null && (rotation == ROTATE_90 || rotation == ROTATE_270)) {
        return width;
      }
      else {
        return height;
      }
    }
docs: Swaps height with width if rotated 90° clock-wise or counter clock-wise
  @param width Rendition width
  @param height Rendition height
  @return Height