public static boolean isStandardLibrarySkeleton(@NotNull VirtualFile virtualFile) {
    final VirtualFile skeletonsDir = getUserSkeletonsDirectory();
    if (skeletonsDir == null) {
      return false;
    }
    final String relativePath = VfsUtilCore.getRelativePath(virtualFile, skeletonsDir, '/');
    // not under skeletons directory
    if (relativePath == null) {
      return false;
    }
    final String firstComponent = ContainerUtil.getFirstItem(StringUtil.split(relativePath, "/"));
    return STDLIB_SKELETONS.contains(firstComponent);
  }
public static boolean isStandardLibrarySkeleton(@NotNull VirtualFile virtualFile)