* RTC support

* Constructs an error with a pointer to an URL with more information. * @param {String} id the error ID that maps to an ID on a web page. *

* Cycles over properties in an object and calls a function for each * property value. If the function returns a truthy value, then the * ite

* Returns the full string for the localStorage expiration item. * @param {String} key * @return {string}