code: public ServiceFuture<PrivateZoneInner> updateAsync(String resourceGroupName, String privateZoneName, PrivateZoneInner parameters, String ifMatch, final ServiceCallback<PrivateZoneInner> serviceCallback) {
          return ServiceFuture.fromResponse(updateWithServiceResponseAsync(resourceGroupName, privateZoneName, parameters, ifMatch), serviceCallback);
      }
docs: Updates a Private DNS zone. Does not modify virtual network links or DNS records within the zone.
  
  @param resourceGroupName The name of the resource group.
  @param privateZoneName The name of the Private DNS zone (without a terminating dot).
  @param parameters Parameters supplied to the Update operation.
  @param ifMatch The ETag of the Private DNS zone. Omit this value to always overwrite the current zone. Specify the last-seen ETag value to prevent accidentally overwriting any concurrent changes.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object