code: public ServiceFuture<TagDetailsInner> createOrUpdateAsync(String tagName, final ServiceCallback<TagDetailsInner> serviceCallback) {
          return ServiceFuture.fromResponse(createOrUpdateWithServiceResponseAsync(tagName), serviceCallback);
      }
docs: Creates a tag in the subscription.
  The tag name can have a maximum of 512 characters and is case insensitive. Tag names created by Azure have prefixes of microsoft, azure, or windows. You cannot create tags with one of these prefixes.
  
  @param tagName The name of the tag to create.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object