Package-level declarations

Decorator that adds observer capability to any StateContainer.

Thread-safe notifier for state changes.

Interface for observing state changes.

Creates a composite observer from multiple observers.

Creates a StateObserver that only reacts when a predicate is satisfied.

Creates a StateObserver that only reacts to specific state types.

Creates a StateObserver that only reacts to actual state changes (not same state).

Convenience observer that only cares about the new state.