@Override
    protected void appendMigrationTypeEditor(JPanel panel, GridBagConstraints gc) {
      final PsiType type = getRootType();
      final String typeText = type != null ? type.getPresentableText() : "<unknown>";
      panel.add(new JLabel(getTypeMigrationLabelText(myRoots[0], typeText)), gc);
      panel.add(myToTypeEditor, gc);
    }
@Override
    protected void appendMigrationTypeEditor(JPanel panel, GridBagConstraints gc)