nl_tokens: https : // dom . spec . whatwg . org / #concept - event - path - append
pl_tokens: function appendToEventPath ( eventImpl , <mask> , targetOverride , relatedTarget , touchTargets , slotInClosedTree ) { const itemInShadowTree = isNode ( target ) && isShadowRoot ( getRoot ( target ) ) ; const rootOfClosedTree = isShadowRoot ( target ) && target . mode === "closed" ; eventImpl . _path . push ( { item : target , itemInShadowTree , target : targetOverride , relatedTarget , touchTargets , rootOfClosedTree , slotInClosedTree } ) ; }