code: function(bindings) {
              for (var action in bindings) {
                  var keys = bindings[action];
                  for (var i = 0; i < keys.length; i++) {
                      var key = keys[i];
                      this.bindAction(action, key);
                  }
              }
          }
docs: Loads multiple action key bindings
  @method addBindings
  @param {Object} bindings - An object of key val pairs mapping an action to an array of keys that trigger it. Input.Keys is used to convert input key string names to key codes.
  @param bindings.action1 {Array} Input keys mapped to action1. ['A', 'B', ...]
  @param bindings.action2 {Array} Input keys mapped to action2. ['X', 'Y', ...]
  @param bindings....
  @example
  bindings param example:
  {
  up: ['UP_ARROW'],
  down: ['DOWN_ARROW'],
  left: ['LEFT_ARROW'],
  right: ['RIGHT_ARROW'],
  }