new TypeResolver()
            .where(
                ImmutableMap.of(
                    new TypeResolver.TypeVariableKey(typeParam.typeVariable), typeArg.runtimeType));
    // If there's any type error, we'd report now rather than later.
    return new SimpleTypeToken<>(resolver.resolveType(runtimeType));
  }

  /**
   * Returns a new {@code TypeToken} where type variables represented by {@code typeParam} are