public void setTransparencyChessboardCellSize(int cellSize) {
    int oldValue = chessboard.getCellSize();
    if (oldValue != cellSize) {
      chessboard.setCellSize(cellSize);
      firePropertyChange(TRANSPARENCY_CHESSBOARD_CELL_SIZE_PROP, oldValue, cellSize);
    }
  }
public void setTransparencyChessboardCellSize(int cellSize)