public static AvroGenericCoder of(Schema schema) {
    return AvroGenericCoder.of(schema);
  }
@Test
  public void testDeterminismStringable() {
    assertDeterministic(AvroCoder.of(String.class));
    assertNonDeterministic(
        AvroCoder.of(StringableClass.class),
        reasonClass(StringableClass.class, "may not have deterministic #toString()"));
  }