public static <T> IterableCoder<T> of(Coder<T> elemCoder) {
    return new IterableCoder<>(elemCoder);
  }
@Test
  public void testCoderIsSerializableWithWellKnownCoderType() throws Exception {
    CoderProperties.coderSerializable(ListCoder.of(GlobalWindow.Coder.INSTANCE));
  }