code: public Observable<NameAvailabilityResponseInner> checkChildrenNameAvailabilityAsync(String groupName, String serviceName, NameAvailabilityRequest parameters) {
          return checkChildrenNameAvailabilityWithServiceResponseAsync(groupName, serviceName, parameters).map(new Func1<ServiceResponse<NameAvailabilityResponseInner>, NameAvailabilityResponseInner>() {
              @Override
              public NameAvailabilityResponseInner call(ServiceResponse<NameAvailabilityResponseInner> response) {
                  return response.body();
              }
          });
      }
docs: Check nested resource name validity and availability.
  This method checks whether a proposed nested resource name is valid and available.
  
  @param groupName Name of the resource group
  @param serviceName Name of the service
  @param parameters Requested name to validate
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the NameAvailabilityResponseInner object