NOTE This is a private utility class for internal use by the framework. Don't rely on its existence.
Base class for any client-side storage. Used as a superclass for Memory and
Web Storage proxies. Do not use directly, use one of the subclasses instead.
Abstract function that must be implemented by each ClientProxy subclass. This should purge all record data
from the client side storage, as well as removing any supporting data (such as lists of record IDs)
true in this class to identify that requests made on this proxy are
Defaults to: true