Acks { public static Ack acknowledge(Message id) { checkNotNull(id); return setStatus(id, Responses.statusOk()); } private  Acks(); static Ack acknowledge(Message id); static Ack reject(Message id, Error cause); static Ack reject(Message id, RejectionEnvelope cause);  }
@Test @DisplayName("create 'acknowledge' `Ack` instance") void acknowledge() { Ack ack = Acks.acknowledge(ID); assertIdEquals(ack); assertStatusCase(ack, OK); }