bug(ObservableMap): Avoid no-op MapChangeRecord (#22) * bug(ObservableMap): Avoid no-op MapChangeRecord i.e., `notifyChange(new MapChangeRecord(this, 'key', 'someValue', 'someValue'))`. * Run dartfmt.
Support for detecting and being notified when an object is mutated.
There are two general ways to detect changes:
Observable.changes and be notified when an object changesDiffer.diff to determine changes between two objects