@Override
  public @Nullable NewVirtualFile findChildIfCached(@NotNull String name) {
    VirtualFileSystemEntry found = doFindChildInArray(name, isCaseSensitive());
    //noinspection UseVirtualFileEquals
    return found == NULL_VIRTUAL_FILE ? null : found;
  }
@Override
  public @Nullable NewVirtualFile findChildIfCached(@NotNull String name)