code: public Observable<ServiceResponse<WorkflowRunActionRepetitionDefinitionCollectionInner>> listWithServiceResponseAsync(String resourceGroupName, String workflowName, String runName, String actionName) {
          if (this.client.subscriptionId() == null) {
              throw new IllegalArgumentException("Parameter this.client.subscriptionId() is required and cannot be null.");
          }
          if (resourceGroupName == null) {
              throw new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null.");
          }
          if (workflowName == null) {
              throw new IllegalArgumentException("Parameter workflowName is required and cannot be null.");
          }
          if (runName == null) {
              throw new IllegalArgumentException("Parameter runName is required and cannot be null.");
          }
          if (actionName == null) {
              throw new IllegalArgumentException("Parameter actionName is required and cannot be null.");
          }
          if (this.client.apiVersion() == null) {
              throw new IllegalArgumentException("Parameter this.client.apiVersion() is required and cannot be null.");
          }
          return service.list(this.client.subscriptionId(), resourceGroupName, workflowName, runName, actionName, this.client.apiVersion(), this.client.acceptLanguage(), this.client.userAgent())
              .flatMap(new Func1<Response<ResponseBody>, Observable<ServiceResponse<WorkflowRunActionRepetitionDefinitionCollectionInner>>>() {
                  @Override
                  public Observable<ServiceResponse<WorkflowRunActionRepetitionDefinitionCollectionInner>> call(Response<ResponseBody> response) {
                      try {
                          ServiceResponse<WorkflowRunActionRepetitionDefinitionCollectionInner> clientResponse = listDelegate(response);
                          return Observable.just(clientResponse);
                      } catch (Throwable t) {
                          return Observable.error(t);
                      }
                  }
              });
      }
docs: List the workflow run action scoped repetitions.
  
  @param resourceGroupName The resource group name.
  @param workflowName The workflow name.
  @param runName The workflow run name.
  @param actionName The workflow action name.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the WorkflowRunActionRepetitionDefinitionCollectionInner object