nl_tokens: Event handler for change : <key > . If the contents of the key are changed notify old & new reverse relations and initialize the new relation .
pl_tokens: function ( model , attr , options ) { options = options ? _ . clone ( options ) : { } ; this . setKeyContents ( attr ) ; this . changed = false ; var related = this . findRelated ( options ) ; this . setRelated ( related ) ; if ( ! options . silent ) { var dit = this ; Backbone . Relational . eventQueue . <mask> ( function ( ) { // The `changed` flag can be set in `handleAddition` or `handleRemoval` if ( dit . changed ) { dit . instance . trigger ( 'change:' + dit . key , dit . instance , dit . related , options , true ) ; dit . changed = false ; } } ) ; } }