nl_tokens: You can directly access mapped properties by simply requesting them . The unknownProperty handler will generate an EachArray of each item .
pl_tokens: function ( keyName , value ) { var ret ; ret = new EachArray ( this . _content , keyName , this ) ; Ember . defineProperty ( this , keyName , null , ret ) ; this . beginObservingContentKey ( keyName ) ; return <mask> ; }