nl_tokens: The goal of this method is to temporarily disable specific observers that take action in response to application changes .
pl_tokens: function ( callback , binding ) { var observers = get ( this . constructor , 'relationshipNames' ) . belongsTo ; var self = this ; try { this . _suspendedRelationships = true ; Ember . _suspendObservers ( <mask> , observers , null , 'belongsToDidChange' , function ( ) { Ember . _suspendBeforeObservers ( self , observers , null , 'belongsToWillChange' , function ( ) { callback . call ( binding || self ) ; } ) ; } ) ; } finally { this . _suspendedRelationships = false ; } }