@Override
  public void actionPerformed(@NotNull AnActionEvent e) {
    final Project project = e.getData(CommonDataKeys.PROJECT);
    assert project != null;
    final Editor editor = e.getData(CommonDataKeys.EDITOR);
    assert editor != null;
    final int offset = editor.getCaretModel().getOffset();
    final PsiFile file = PsiDocumentManager.getInstance(project).getPsiFile(editor.getDocument());
    PsiClass psiClass = PsiTreeUtil.getParentOfType(file.findElementAt(offset), PsiClass.class);
    assert psiClass != null;

    if (!PsiUtil.hasDefaultConstructor(psiClass)) {
      Messages.showMessageDialog(project, UIDesignerBundle.message("generate.main.no.default.constructor"), UIDesignerBundle.message("generate.main.title"), Messages.getErrorIcon());
      return;
    }

    final List<PsiFile> boundForms = FormClassIndex.findFormsBoundToClass(project, psiClass.getQualifiedName());
    final LwRootContainer rootContainer;
    try {
      rootContainer = Utils.getRootContainer(boundForms.get(0).getText(), null);
    }
    catch (AlienFormFileException ex) {
      Messages.showMessageDialog(project, UIDesignerBundle.message("generate.main.not.valid.form"),
                                 UIDesignerBundle.message("generate.main.title"), Messages.getErrorIcon());
      return;
    }
    catch (Exception ex) {
      LOG.error(ex);
      return;
    }

    if (rootContainer.getComponentCount() == 0) {
      Messages.showMessageDialog(project, UIDesignerBundle.message("generate.main.empty.form"),
                                 UIDesignerBundle.message("generate.main.title"), Messages.getErrorIcon());
      return;
    }
    String rootBinding = rootContainer.getComponent(0).getBinding();
    if (rootBinding == null || psiClass.findFieldByName(rootBinding, true) == null) {
      Messages.showMessageDialog(project, UIDesignerBundle.message("generate.main.no.root.binding"),
                                 UIDesignerBundle.message("generate.main.title"), Messages.getErrorIcon());
      return;
    }

    final @NonNls StringBuilder mainBuilder = new StringBuilder("public static void main(String[] args) { ");
    final JavaCodeStyleManager csm = JavaCodeStyleManager.getInstance(project);
    SuggestedNameInfo nameInfo = csm.suggestVariableName(VariableKind.LOCAL_VARIABLE, "frame", null, null);
    String varName = nameInfo.names [0];
    mainBuilder.append(JFrame.class.getName()).append(" ").append(varName).append("= new ").append(JFrame.class.getName());
    mainBuilder.append("(\"").append(psiClass.getName()).append("\");");
    mainBuilder.append(varName).append(".setContentPane(new ").append(psiClass.getQualifiedName()).append("().").append(rootBinding).append(");");
    mainBuilder.append(varName).append(".setDefaultCloseOperation(").append(JFrame.class.getName()).append(".EXIT_ON_CLOSE);");
    mainBuilder.append(varName).append(".pack();");
    mainBuilder.append(varName).append(".setVisible(true);");

    mainBuilder.append("}\n");

    CommandProcessor.getInstance().executeCommand(project, () -> ApplicationManager.getApplication().runWriteAction(() -> {
      try {
        PsiMethod method =
          JavaPsiFacade.getInstance(file.getProject()).getElementFactory().createMethodFromText(mainBuilder.toString(), file);
        List<PsiGenerationInfo<PsiMethod>> infos = Collections.singletonList(new PsiGenerationInfo<>(method));
        List<PsiGenerationInfo<PsiMethod>> resultMembers = GenerateMembersUtil.insertMembersAtOffset(file, offset, infos);
        resultMembers.get(0).positionCaret(editor, false);
      }
      catch (IncorrectOperationException e1) {
        LOG.error(e1);
      }
    }), null, null);
  }
@Override
  public void actionPerformed(@NotNull AnActionEvent e)