Instrument event propagation (added / removed / deleted / size).
Instrument event propagation (added / removed / deleted / size).

LockerProject/Locker,LockerProject/Locker,LockerProject/Locker,Singly/hallway,LockerProject/Locker,othiym23/locker,othiym23/locker,Singly/hallway,othiym23/locker,othiym23/locker,LockerProject/Locker,othiym23/locker