in book/master_middleman/source/javascripts/waypoints/waypoint.js [93:101]
Waypoint.invokeAll = function(method) {
var allWaypointsArray = []
for (var waypointKey in allWaypoints) {
allWaypointsArray.push(allWaypoints[waypointKey])
}
for (var i = 0, end = allWaypointsArray.length; i < end; i++) {
allWaypointsArray[i][method]()
}
}