boolean isSubtypeOf(Type supertype) {
      for (Type bound : bounds) {
        if (of(bound).isSubtypeOf(supertype) == target) {
          return target;
        }
      }
      return !target;
    }

    boolean isSupertypeOf(Type subtype) {
      TypeToken<?> type = of(subtype);
      for (Type bound : bounds) {
        if (type.isSubtypeOf(bound) == target) {
          return target;
        }