docs: public <X, QP extends MessageQueryParameter<X>> List<X> getQueryParameter(Class<QP> parameterClass) {
  		@SuppressWarnings("unchecked")
  		QP queryParameter = (QP) queryParameters.get(parameterClass);
  		if (queryParameter == null) {
  			return Collections.emptyList();
  		} else {
  			return queryParameter.getValue();
  		}
  	}