@SuppressWarnings({"StringEquality", "StringEqualitySSR"})
  public static boolean areSameInstance(@Nullable String s1, @Nullable String s2) {
    return s1 == s2;
  }
@SuppressWarnings({"StringEquality", "StringEqualitySSR"})
  public static boolean areSameInstance(@Nullable String s1, @Nullable String s2)