code: function addNotifyListener(node, inst, binding) {
    if (binding.listenerEvent) {
      let part = binding.parts[0];
      node.addEventListener(binding.listenerEvent, function(e) {
        handleNotification(e, inst, binding.target, part.source, part.negate);
      });
    }
  }
docs: Adds a 2-way binding notification event listener to the node specified
  
  @param {Object} node Child element to add listener to
  @param {!PropertyEffectsType} inst Host element instance to handle notification event
  @param {Binding} binding Binding metadata
  @return {void}
  @private