this.model
.addObserver(this, 'data', this.modelDataChanged.bind(this))
.addObserver(this, 'synced', this.modelSyncChanged.bind(this));
this.model
.addObserver(this, 'data', this.modelDataChanged.bind(this))
.addObserver(this, 'synced', this.modelSyncChanged.bind(this));