code: public boolean isFlowRequest() {
          GrailsApplication application = getAttributes().getGrailsApplication();
          Object controllerClassObject = getControllerClass();
          GrailsControllerClass controllerClass = null;
          if(controllerClassObject instanceof GrailsControllerClass) {
              controllerClass = (GrailsControllerClass) controllerClassObject;
          }
  
          if (controllerClass == null) return false;
  
          String actionName = getActionName();
          if (actionName == null) actionName = controllerClass.getDefaultAction();
          if (actionName == null) return false;
  
          return false;
      }
docs: Returns true if the current executing request is a flow request
  
  @return true if it is a flow request