flow like the river

BACK_BACK/node_modules/babel-runtime/helpers/defaults.js

@@ -0,0 +1,32 @@
+"use strict";
+
+exports.__esModule = true;
+
+var _defineProperty = require("../core-js/object/define-property");
+
+var _defineProperty2 = _interopRequireDefault(_defineProperty);
+
+var _getOwnPropertyDescriptor = require("../core-js/object/get-own-property-descriptor");
+
+var _getOwnPropertyDescriptor2 = _interopRequireDefault(_getOwnPropertyDescriptor);
+
+var _getOwnPropertyNames = require("../core-js/object/get-own-property-names");
+
+var _getOwnPropertyNames2 = _interopRequireDefault(_getOwnPropertyNames);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+exports.default = function (obj, defaults) {
+  var keys = (0, _getOwnPropertyNames2.default)(defaults);
+
+  for (var i = 0; i < keys.length; i++) {
+    var key = keys[i];
+    var value = (0, _getOwnPropertyDescriptor2.default)(defaults, key);
+
+    if (value && value.configurable && obj[key] === undefined) {
+      (0, _defineProperty2.default)(obj, key, value);
+    }
+  }
+
+  return obj;
+};