assertThrows(
        IllegalArgumentException.class,
        () -> Types.newParameterizedTypeWithOwner(Number.class, List.class, String.class));
  }

  public void testNewParameterizedType_ownerMissing() {
    assertEquals(
        Types.newParameterizedType(Entry.class, String.class, Integer.class),
        Types.newParameterizedTypeWithOwner(null, Entry.class, String.class, Integer.class));
  }

    assertThrows(
        IllegalArgumentException.class,
        () -> Types.newParameterizedTypeWithOwner(Number.class, List.class, String.class));
  }

  public void testNewParameterizedType_ownerMissing() {
    assertEquals(
        Types.newParameterizedType(Entry.class, String.class, Integer.class),
        Types.newParameterizedTypeWithOwner(null, Entry.class, String.class, Integer.class));
  }

  }

  /**
   * Returns a type where {@code rawType} is parameterized by {@code arguments} and is owned by
   * {@code ownerType}.
   */
  static ParameterizedType newParameterizedTypeWithOwner(
      @CheckForNull Type ownerType, Class<?> rawType, Type... arguments) {
    if (ownerType == null) {
      return newParameterizedType(rawType, arguments);
    }