@Override
  protected JComponent createNorthPanel() {
    JPanel panel = new JPanel();

    panel.setLayout(new GridBagLayout());
    GridBagConstraints gbConstraints = new GridBagConstraints();

    gbConstraints.insets = new Insets(4, 0, 4, 8);
    gbConstraints.weighty = 1;
    gbConstraints.weightx = 1;
    gbConstraints.gridy = 0;
    gbConstraints.gridwidth = GridBagConstraints.REMAINDER;
    gbConstraints.fill = GridBagConstraints.BOTH;
    gbConstraints.anchor = GridBagConstraints.WEST;
    final JLabel classComboLabel = new JLabel();
    panel.add(classComboLabel, gbConstraints);

    myClassCombo = new JComboBox(mySuperClasses.toArray());
    initClassCombo(myClassCombo);
    classComboLabel.setText(RefactoringBundle.message("pull.up.members.to", UsageViewUtil.getLongName(myClass)));
    classComboLabel.setLabelFor(myClassCombo);
    final Class preselection = getPreselection();
    int indexToSelect = 0;
    if (preselection != null) {
      indexToSelect = mySuperClasses.indexOf(preselection);
    }
    myClassCombo.setSelectedIndex(indexToSelect);
    myClassCombo.addItemListener(new ItemListener() {
      @Override
      public void itemStateChanged(ItemEvent e) {
        if (e.getStateChange() == ItemEvent.SELECTED) {
          updateMemberInfo();
        }
      }
    });
    gbConstraints.gridy++;
    panel.add(myClassCombo, gbConstraints);

    return panel;
  }
@Override
  protected JComponent createNorthPanel()