static JButton tableDependentButton_extraCondition(JTable table, S text, O action, F0<Bool> extraCondition) {
  final JButton b = jbutton(text, action);
  onTableSelectionChangedAndNow(table, r {
    b.setEnabled(table.getSelectedRow() >= 0 && isTrue(callF(extraCondition)))
  });
  ret b;
}

static JButton tableDependentButton_extraCondition(JTable table, IF0<Bool> extraCondition, S text, Runnable action) {
  JButton b = jbutton(text, action);
  onTableSelectionChangedAndNow(table, r {
    b.setEnabled(table.getSelectedRow() >= 0 && (extraCondition == null || extraCondition!));
  });
  ret b;
}

Began life as a copy of #1016591