public static <T extends Writable> WritableCoder<T> of(Class<T> clazz) {
    return new WritableCoder<>(clazz);
  }
@Test
  public void testIntWritableEncoding() throws Exception {
    IntWritable value = new IntWritable(42);
    WritableCoder<IntWritable> coder = WritableCoder.of(IntWritable.class);

    CoderProperties.coderDecodeEncodeEqual(coder, value);
  }