code: public Observable<NameAvailabilityInformationInner> checkNameAvailabilityAsync(String location, CheckNameAvailabilityParameters parameters) {
          return checkNameAvailabilityWithServiceResponseAsync(location, parameters).map(new Func1<ServiceResponse<NameAvailabilityInformationInner>, NameAvailabilityInformationInner>() {
              @Override
              public NameAvailabilityInformationInner call(ServiceResponse<NameAvailabilityInformationInner> response) {
                  return response.body();
              }
          });
      }
docs: Checks whether the specified account name is available or taken.
  
  @param location The resource location without whitespace.
  @param parameters Parameters supplied to check the Data Lake Analytics account name availability.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the NameAvailabilityInformationInner object