Accepting children element.

.gitignore

@@ -1,6 +1,5 @@
 *.DS_Store
 node_modules
-dist
 styles.min.css
 styles.min.css.map
 coverage

dist/commonjs/Manager.js

@@ -0,0 +1,74 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+	value: true
+});
+
+var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
+
+var _find = require('lodash/find');
+
+var _find2 = _interopRequireDefault(_find);
+
+var _sortBy = require('lodash/sortBy');
+
+var _sortBy2 = _interopRequireDefault(_sortBy);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
+var Manager = function () {
+	function Manager() {
+		_classCallCheck(this, Manager);
+
+		this.refs = {};
+	}
+
+	_createClass(Manager, [{
+		key: 'add',
+		value: function add(collection, ref) {
+			if (!this.refs[collection]) this.refs[collection] = [];
+
+			this.refs[collection].push(ref);
+		}
+	}, {
+		key: 'remove',
+		value: function remove(collection, ref) {
+			var index = this.getIndex(collection, ref);
+
+			if (index !== -1) {
+				this.refs[collection].splice(index, 1);
+			}
+		}
+	}, {
+		key: 'getActive',
+		value: function getActive() {
+			var _this = this;
+
+			return (0, _find2.default)(this.refs[this.active.collection], function (_ref) {
+				var node = _ref.node;
+				return node.sortableInfo.index == _this.active.index;
+			});
+		}
+	}, {
+		key: 'getIndex',
+		value: function getIndex(collection, ref) {
+			return this.refs[collection].indexOf(ref);
+		}
+	}, {
+		key: 'getOrderedRefs',
+		value: function getOrderedRefs() {
+			var collection = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this.active.collection;
+
+			return (0, _sortBy2.default)(this.refs[collection], function (_ref2) {
+				var node = _ref2.node;
+				return node.sortableInfo.index;
+			});
+		}
+	}]);
+
+	return Manager;
+}();
+
+exports.default = Manager;