code: public Descriptor withExceptionSerializer(ExceptionSerializer exceptionSerializer) {
          return new Descriptor(name, calls, pathParamSerializers, messageSerializers, serializerFactory, exceptionSerializer, autoAcl, acls, headerFilter, locatableService, circuitBreaker, topicCalls);
      }
docs: Use the given exception serializer to serialize and deserialized exceptions handled by this service.
  
  @param exceptionSerializer The exception handler to use.
  @return A copy of this descriptor.