nl_tokens: Determine if the model has changed since the last change event . If you specify an attribute name determine if that attribute has changed .
pl_tokens: function ( attr ) { if ( attr == null ) return ! ! Object . <mask> ( this . _changed ) . length ; if ( has ( this . _derived , attr ) ) { return this . _derived [ attr ] . depList . some ( function ( dep ) { return this . hasChanged ( dep ) ; } , this ) ; } return has ( this . _changed , attr ) ; }