nl_tokens: unregisterWaiter is used to unregister a callback that was registered with registerWaiter .
pl_tokens: function ( context , callback ) { var pair ; if ( ! this . waiters ) { return ; } if ( arguments . length === 1 ) { callback = context ; context = null ; } <mask> = [ context , callback ] ; this . waiters = Ember . A ( this . waiters . filter ( function ( elt ) { return Ember . compare ( elt , pair ) !== 0 ; } ) ) ; }