'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
var _doLimit = require('./internal/doLimit');
var _doLimit2 = _interopRequireDefault(_doLimit);
var _groupByLimit = require('./groupByLimit');
var _groupByLimit2 = _interopRequireDefault(_groupByLimit);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
/**
* The same as [`groupBy`]{@link module:Collections.groupBy} but runs only a single async operation at a time.
*
* @name groupBySeries
* @static
* @memberOf module:Collections
* @method
* @see [async.groupBy]{@link module:Collections.groupBy}
* @category Collection
* @param {Array|Iterable|Object} coll - A collection to iterate over.
* @param {number} limit - The maximum number of async operations at a time.
* @param {AsyncFunction} iteratee - An async function to apply to each item in
* `coll`.
* The iteratee should complete with a `key` to group the value under.
* Invoked with (value, callback).
* @param {Function} [callback] - A callback which is called when all `iteratee`
* functions have finished, or an error occurs. Result is an `Object` whoses
* properties are arrays of values which returned the corresponding key.
*/
exports.default = (0, _doLimit2.default)(_groupByLimit2.default, 1);
module.exports = exports['default'];