private void createUIComponents() {
    final PsiFile file = mySourceMethod.getContainingFile();
    packageTextField =
          new PackageNameReferenceEditorCombo(file instanceof PsiJavaFile ? ((PsiJavaFile)file).getPackageName() : "", myProject, RECENTS_KEY, RefactoringBundle.message("choose.destination.package"));
        final Document document = packageTextField.getChildComponent().getDocument();
    final com.intellij.openapi.editor.event.DocumentListener adapter = new com.intellij.openapi.editor.event.DocumentListener() {
      @Override
      public void documentChanged(@NotNull com.intellij.openapi.editor.event.DocumentEvent e) {
        validateButtons();
      }
    };
    document.addDocumentListener(adapter);

    existingClassField = new ReferenceEditorComboWithBrowseButton(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e) {
        final Project project = mySourceMethod.getProject();
        final GlobalSearchScope scope = GlobalSearchScope.allScope(project);
        final TreeJavaClassChooserDialog chooser =
          new TreeJavaClassChooserDialog(RefactorJBundle.message("select.wrapper.class"), project, scope, null, null);
        final String classText = existingClassField.getText();
        final PsiClass currentClass = JavaPsiFacade.getInstance(project).findClass(classText, GlobalSearchScope.allScope(project));
        if (currentClass != null) {
          chooser.select(currentClass);
        }
        chooser.show();
        final PsiClass selectedClass = chooser.getSelected();
        if (selectedClass != null) {
          final String className = selectedClass.getQualifiedName();
          existingClassField.setText(className);
          RecentsManager.getInstance(myProject).registerRecentEntry(EXISTING_KEY, className);
        }
      }
    }, "", myProject, true, EXISTING_KEY);

    existingClassField.getChildComponent().getDocument().addDocumentListener(new com.intellij.openapi.editor.event.DocumentListener() {
      @Override
      public void documentChanged(@NotNull com.intellij.openapi.editor.event.DocumentEvent e) {
        validateButtons();
        enableGenerateAccessors();
      }
    });
    myDestinationCb = new DestinationFolderComboBox() {
      @Override
      public String getTargetPackage() {
        return getPackageName();
      }
    };
    ((DestinationFolderComboBox)myDestinationCb).setData(myProject, mySourceMethod.getContainingFile().getContainingDirectory(), packageTextField.getChildComponent());
  }
private void createUIComponents()