code: public static base_response update(nitro_service client, callhome resource) throws Exception {
  		callhome updateresource = new callhome();
  		updateresource.emailaddress = resource.emailaddress;
  		updateresource.proxymode = resource.proxymode;
  		updateresource.ipaddress = resource.ipaddress;
  		updateresource.port = resource.port;
  		return updateresource.update_resource(client);
  	}
docs: Use this API to update callhome.