Support for detecting and being notified when an object is mutated.

There are two kinds of change notifiers:

• AsyncChangeNotifier: be notified of a continuous stream of events over time.
• ChangeNotifier: be notified at the moment of a change. This is a direct extraction of ChangeNotifier in Flutter Core.

Some suggested uses for this library:

• Observe objects for changes, and log when a change occurs
• Optimize for observable collections in your own APIs and libraries instead of diffing
• Implement simple data-binding by listening to streams

Usage

There are two general ways to detect changes:

• Listen to ChangeNotifier.changes and be notified when an object changes
• Use Differ.diff to determine changes between two objects