nl_tokens: Overrides Ember . Array s replace method to implement
pl_tokens: function ( index , removed , added ) { // Map the array of record objects into an array of  client ids. added = map ( added , function ( record ) { Ember . assert ( "You cannot add '" + record . constructor . typeKey + "' records to this relationship (only '" + this . type . typeKey + "' allowed)" , ! this . type || <mask> instanceof this . type ) ; return record ; } , this ) ; this . _super ( index , removed , added ) ; }