code: public ServiceFuture<CheckAvailabilityResultInner> checkAvailabilityAsync(CheckAvailabilityParameters parameters, final ServiceCallback<CheckAvailabilityResultInner> serviceCallback) {
          return ServiceFuture.fromResponse(checkAvailabilityWithServiceResponseAsync(parameters), serviceCallback);
      }
docs: Checks the availability of the given service namespace across all Azure subscriptions. This is useful because the domain name is created based on the service namespace name.
  
  @param parameters The namespace name.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object