public static boolean isTopLevelClass(@NotNull PsiClass aClass) {
    if (aClass.getContainingClass() != null) {
      return false;
    }

    if (aClass instanceof PsiAnonymousClass) {
      return false;
    }

    PsiElement parent = aClass.getParent();
    if (parent instanceof PsiDeclarationStatement && parent.getParent() instanceof PsiCodeBlock) {
      return false;
    }

    PsiFile parentFile = aClass.getContainingFile();
    return parentFile != null && parentFile.getLanguage() == JavaLanguage.INSTANCE;  // do not select JspClass
  }
public static boolean isTopLevelClass(@NotNull PsiClass aClass)