protected int getTreeColumnOffsetX() {
    int offsetX = 0;
    for (int i = 0; i < myTreeTable.getColumnCount(); i++) {
      if (myTreeTable.isTreeColumn(i)) {
        break;
      }
      offsetX += myTreeTable.getColumnModel().getColumn(i).getWidth();
    }
    return offsetX;
  }
protected int getTreeColumnOffsetX()