code: public void setBoardPivotY(float y) {
          if (mListeners != null) {
              for (StateListener l : mListeners) {
                  l.onBoardPivotY(this, y);
              }
          }
          mContentView.setPivotY(y);
      }
docs: Set the y location of pivot point around which this board is rotated.
  
  @param y