Type of the entry.
Whether GC is idle.
Number of managed entries.
Clear all managed entries.
Leaves entry without expiration, by un-managing it.
Entry to be un-managed.
Manage entry expiration.
Entry to be managed.
Register callback invoked when entry expires.
Callback.
Notify GC about expiration change of the managed entry.
Old expiration of the entry.
Managed entry containing new expiration.
Garbage Collector manages expiration for a set of entries.