private void doAddAction() {
    TableCellEditor editor = myTable.getCellEditor();
    if (editor != null) editor.cancelCellEditing();

    int row = myTable.getSelectedRow();
    Object selectedTarget = row >= 0 ? myModel.data.get(myTable.convertRowIndexToModel(row)).first : null;
    VirtualFile toSelect = myFileToSelect != null ? myFileToSelect :
                           ObjectUtils.tryCast(selectedTarget, VirtualFile.class);
    FileChooserDescriptor descriptor = new FileChooserDescriptor(!param(ONLY_DIRECTORIES), true, true, true, true, true);
    FileChooser.chooseFiles(descriptor, myProject, myTable, toSelect, this::doAddFiles);
  }
private void doAddAction()