nl_tokens: Gets or creates a subscribable that fires after each array mutation
pl_tokens: function getSubscribableForArray ( ko , array ) { var subscribable = array . _subscribable ; var signal = { } ; if ( ! subscribable ) { subscribable = array . _subscribable = <mask> ko . subscribable ( ) ; wrapStandardArrayMutators ( array , subscribable , signal ) ; addKnockoutArrayMutators ( ko , array , subscribable , signal ) ; } return subscribable ; }