veered

// Only trigger enclosing computation if the return value of 
// f is not EJSON.equals to the previuous return value
Tracker.guard = function(f) {
  if (Meteor.isServer || !Tracker.currentComputation) {
    return f();
  }

  let dep = new Tracker.Dependency(),
      curView = Blaze.currentView,
      tplFunc = Template._currentTemplateInstanceFunc;