public static boolean isFileInSkeletons(@NotNull final VirtualFile virtualFile, @NotNull Sdk sdk) {
    final VirtualFile skeletonsDir = findSkeletonsDir(sdk);
    return skeletonsDir != null && VfsUtilCore.isAncestor(skeletonsDir, virtualFile, false);
  }
public static boolean isFileInSkeletons(@NotNull final VirtualFile virtualFile, @NotNull Sdk sdk)