code: public static base_response update(nitro_service client, dnskey resource) throws Exception {
  		dnskey updateresource = new dnskey();
  		updateresource.keyname = resource.keyname;
  		updateresource.expires = resource.expires;
  		updateresource.units1 = resource.units1;
  		updateresource.notificationperiod = resource.notificationperiod;
  		updateresource.units2 = resource.units2;
  		updateresource.ttl = resource.ttl;
  		return updateresource.update_resource(client);
  	}
docs: Use this API to update dnskey.