@Nullable
  public static @NlsSafe String toAntlibResource(String antlibUri) {
    if (!antlibUri.startsWith(ANTLIB_URI_PREFIX)) {
      return null;
    }
    return antlibUri.substring(ANTLIB_URI_PREFIX.length()).replace('.', '/') + "/" + ANTLIB_DEFAULT_FILENAME;
  }
@Nullable
  public static @NlsSafe String toAntlibResource(String antlibUri)