docs: public Observable<ServiceResponse<SharedAccessAuthorizationRuleResourceInner>> getAuthorizationRuleWithServiceResponseAsync(String resourceGroupName, String namespaceName, String authorizationRuleName) {
          if (resourceGroupName == null) {
              throw new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null.");
          }
          if (namespaceName == null) {
              throw new IllegalArgumentException("Parameter namespaceName is required and cannot be null.");
          }
          if (authorizationRuleName == null) {
              throw new IllegalArgumentException("Parameter authorizationRuleName 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 (this.client.apiVersion() == null) {
              throw new IllegalArgumentException("Parameter this.client.apiVersion() is required and cannot be null.");
          }
          return service.getAuthorizationRule(resourceGroupName, namespaceName, authorizationRuleName, this.client.subscriptionId(), this.client.apiVersion(), this.client.acceptLanguage(), this.client.userAgent())
              .flatMap(new Func1<Response<ResponseBody>, Observable<ServiceResponse<SharedAccessAuthorizationRuleResourceInner>>>() {
                  @Override
                  public Observable<ServiceResponse<SharedAccessAuthorizationRuleResourceInner>> call(Response<ResponseBody> response) {
                      try {
                          ServiceResponse<SharedAccessAuthorizationRuleResourceInner> clientResponse = getAuthorizationRuleDelegate(response);
                          return Observable.just(clientResponse);
                      } catch (Throwable t) {
                          return Observable.error(t);
                      }
                  }
              });
      }