code: function (aggregateId, callback) {
      if (!aggregateId || !_.isString(aggregateId)) {
        var err = new Error('Please pass a valid aggregateId!');
        debug(err);
        throw err;
      }
      if (!callback || !_.isFunction(callback)) {
        var err = new Error('Please pass a valid callback!');
        debug(err);
        throw err;
      }
  
      this.aggregateLock.resolve(aggregateId, callback);
    }
docs: Resolves if the aggregate lock.
  @param {String}   aggregateId The passed aggregateId.
  @param {Function} callback    The function, that will be called when this action is completed.
  `function(err){}`