--- /dev/null
+"use strict";\r
+Object.defineProperty(exports, "__esModule", { value: true });\r
+/**\r
+ * Flatten nested arrays (max depth is 2) into a non-nested array of non-array items.\r
+ */\r
+function flatten(items) {\r
+ return items.reduce(function (collection, item) { return [].concat(collection, item); }, []);\r
+}\r
+exports.flatten = flatten;\r