code: function(name, identifier) {
  
        if (_.isUndefined(this._events[name])) { return this; }
  
        if (_.isFunction(identifier)) {
          this._events[name] = _.reject(this._events[name], function(b) {
            return b.callback === identifier;
          });
  
        } else if ( _.isString(identifier)) {
          this._events[name] = _.reject(this._events[name], function(b) {
            return b.token === identifier;
          });
  
        } else {
          this._events[name] = [];
        }
        return this;
      }
docs: Allows unsubscribing from a specific event
  Params:
  name - event to unsubscribe from
  identifier - callback to remove OR token.