docs: public void marshall(SignalWorkflowExecutionRequest signalWorkflowExecutionRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (signalWorkflowExecutionRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(signalWorkflowExecutionRequest.getDomain(), DOMAIN_BINDING);
              protocolMarshaller.marshall(signalWorkflowExecutionRequest.getWorkflowId(), WORKFLOWID_BINDING);
              protocolMarshaller.marshall(signalWorkflowExecutionRequest.getRunId(), RUNID_BINDING);
              protocolMarshaller.marshall(signalWorkflowExecutionRequest.getSignalName(), SIGNALNAME_BINDING);
              protocolMarshaller.marshall(signalWorkflowExecutionRequest.getInput(), INPUT_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }