docs: public Observable<StreamingPolicyInner> createAsync(String resourceGroupName, String accountName, String streamingPolicyName, StreamingPolicyInner parameters) {
          return createWithServiceResponseAsync(resourceGroupName, accountName, streamingPolicyName, parameters).map(new Func1<ServiceResponse<StreamingPolicyInner>, StreamingPolicyInner>() {
              @Override
              public StreamingPolicyInner call(ServiceResponse<StreamingPolicyInner> response) {
                  return response.body();
              }
          });
      }