private void clearEditorListeners() {
        final TableCellEditor editor = getCellEditor();
        if (editor instanceof StringTableCellEditor ed) {
          ed.clearListeners();
        }
        else if (editor instanceof CodeFragmentTableCellEditorBase) {
          ((CodeFragmentTableCellEditorBase)editor).clearListeners();
        }
      }
private void clearEditorListeners()