code: public Observable<ServiceResponse<TroubleshootingResultInner>> getTroubleshootingWithServiceResponseAsync(String resourceGroupName, String networkWatcherName, TroubleshootingParameters parameters) {
          if (resourceGroupName == null) {
              throw new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null.");
          }
          if (networkWatcherName == null) {
              throw new IllegalArgumentException("Parameter networkWatcherName is required and cannot be null.");
          }
          if (this.client.subscriptionId() == null) {
              throw new IllegalArgumentException("Parameter this.client.subscriptionId() is required and cannot be null.");
          }
          if (parameters == null) {
              throw new IllegalArgumentException("Parameter parameters is required and cannot be null.");
          }
          Validator.validate(parameters);
          final String apiVersion = "2018-06-01";
          Observable<Response<ResponseBody>> observable = service.getTroubleshooting(resourceGroupName, networkWatcherName, this.client.subscriptionId(), parameters, apiVersion, this.client.acceptLanguage(), this.client.userAgent());
          return client.getAzureClient().getPostOrDeleteResultAsync(observable, new TypeToken<TroubleshootingResultInner>() { }.getType());
      }
docs: Initiate troubleshooting on a specified resource.
  
  @param resourceGroupName The name of the resource group.
  @param networkWatcherName The name of the network watcher resource.
  @param parameters Parameters that define the resource to troubleshoot.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable for the request