code: public ServiceFuture<DnsNameAvailabilityResultInner> checkDnsNameAvailabilityAsync(String location, String domainNameLabel, final ServiceCallback<DnsNameAvailabilityResultInner> serviceCallback) {
          return ServiceFuture.fromResponse(checkDnsNameAvailabilityWithServiceResponseAsync(location, domainNameLabel), serviceCallback);
      }
docs: Checks whether a domain name in the cloudapp.azure.com zone is available for use.
  
  @param location The location of the domain name.
  @param domainNameLabel The domain name to be verified. It must conform to the following regular expression: ^[a-z][a-z0-9-]{1,61}[a-z0-9]$.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object