code: public Observable<NameAvailabilityInner> checkNameAvailabilityAsync(String location, NameAvailabilityParameters parameters) {
          return checkNameAvailabilityWithServiceResponseAsync(location, parameters).map(new Func1<ServiceResponse<NameAvailabilityInner>, NameAvailabilityInner>() {
              @Override
              public NameAvailabilityInner call(ServiceResponse<NameAvailabilityInner> response) {
                  return response.body();
              }
          });
      }
docs: Checks that the SignalR name is valid and is not already in use.
  
  @param location the region
  @param parameters Parameters supplied to the operation.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the NameAvailabilityInner object