static boolean containsJvmLanguage(@NotNull VirtualFile file) {
    FileTypeRegistry fileTypeRegistry = FileTypeRegistry.getInstance();
    Object obj = fileTypeRegistry.getFileTypeByFileName(file.getName());
    LanguageFileType languageFileType = obj instanceof LanguageFileType ? (LanguageFileType)obj : null;
    return languageFileType != null && languageFileType.getLanguage() instanceof JvmLanguage;
  }
static boolean containsJvmLanguage(@NotNull VirtualFile file)