public static <V> Read<V> read() {
    return new AutoValue_SparkReceiverIO_Read.Builder<V>().build();
  }
@Test
  public void testReadValidationFailsMissingReceiverBuilder() {
    SparkReceiverIO.Read<String> read = SparkReceiverIO.read();
    assertThrows(IllegalStateException.class, read::validateTransform);
  }