@Override
  protected JComponent createCenterPanel() {
    final Splitter splitter = new Splitter(true);
    splitter.setFirstComponent(createTablePanel());
    splitter.setSecondComponent(myWholePanel);
    final ActionListener enableDisableListener = new ActionListener() {
      @Override
      public void actionPerformed(final ActionEvent e) {
        setEnabled(myCreateBuilderClassRadioButton.isSelected());
        IdeFocusManager.getInstance(myProject).requestFocus(
          myCreateBuilderClassRadioButton.isSelected() ? myNewClassName : myExistentClassTF.getChildComponent(), true);
        validateButtons();
      }
    };
    myCreateBuilderClassRadioButton.addActionListener(enableDisableListener);
    myExistingBuilderClassRadioButton.addActionListener(enableDisableListener);
    myCreateBuilderClassRadioButton.setSelected(true);
    setEnabled(true);

    final DocumentAdapter validateButtonsListener = new DocumentAdapter() {
      @Override
      protected void textChanged(@NotNull DocumentEvent e) {
        validateButtons();
      }
    };
    myNewClassName.getDocument().addDocumentListener(validateButtonsListener);
    final PsiClass psiClass = myConstructors[0].getContainingClass();
    LOG.assertTrue(psiClass != null);
    @NlsSafe String builderDefaultName = psiClass.getName() + "Builder";
    myNewClassName.setText(builderDefaultName);

    return splitter;
  }
@Override
  protected JComponent createCenterPanel()