code: public IJsonMarshaller getJsonMarshallerFromAnnotation(JsonUnmarshaller jua) throws JsonMarshallerException {
  		if (jua != null) {
  			return argumentServices.getIJsonMarshallerInstance(jua.value());
  		}
  		return null;
  	}
docs: Return JsonUnmarshaller instance from annotation JsonUnmarshaller
  
  @param jua
  @return
  @throws org.ocelotds.marshalling.exceptions.JsonMarshallerException