Class goog.storage.ExpiringStorage

Provides a storage with expirning keys.

Instance Method Summary
	`getWrapper(string key, boolean= opt_expired) ⇒ (Object\|undefined)` Get an item wrapper (the item and its metadata) from the storage.
	`set(string key, <Any Type> value, number= opt_expiration)` Set an item in the storage.

Static Method Summary
	`getCreationTime(!Object wrapper) ⇒ (number\|undefined)` Returns the wrapper creation time.
	`getExpirationTime(!Object wrapper) ⇒ (number\|undefined)` Returns the wrapper expiration time.
	`isExpired(!Object wrapper) ⇒ boolean` Checks if the data item has expired.