@Override
  public @NotNull IntentionPreviewInfo generatePreview(@NotNull Project project, @NotNull Editor editor, @NotNull PsiFile file) {
    PsiElement element = getElement(editor, file);
    if (element == null) return IntentionPreviewInfo.EMPTY;
    PsiType type = getTypeOfUnfilledParameter(editor, element);
    if (type != null) return new IntroduceEmptyVariableHandlerImpl().generatePreview(editor, element.getContainingFile(), type);
    final PsiExpression expression = detectExpressionStatement(element);
    if (expression == null) return IntentionPreviewInfo.EMPTY;
    RefactoringSupportProvider supportProvider = LanguageRefactoringSupport.INSTANCE.forLanguage(JavaLanguage.INSTANCE);
    JavaIntroduceVariableHandlerBase handler = (JavaIntroduceVariableHandlerBase)supportProvider.getIntroduceVariableHandler();
    if (handler instanceof PreviewableRefactoringActionHandler previewableRefactoringActionHandler) {
      return previewableRefactoringActionHandler.generatePreview(project, expression);
    }
    return IntentionPreviewInfo.EMPTY;
  }
@Override
  public @NotNull IntentionPreviewInfo generatePreview(@NotNull Project project, @NotNull Editor editor, @NotNull PsiFile file)