function isTopV8ExecuteEvent(event){return isV8ExecuteEvent(event)&&findParent(isV8ExecuteEvent)===null;}
function isGarbageCollectionEvent(event){return event.title&&event.title.startsWith(GC_EVENT_PREFIX)&&event.title!==LOW_MEMORY_EVENT;}
function isTopGarbageCollectionEvent(event){return event.title in TOP_GC_EVENTS;}
function isForcedGarbageCollectionEvent(event){return findParent(event,isLowMemoryEvent)!==null;}