https://www.target-nehberg.de/core/misc/polyfills/object.assign.js?v=8.9.13

1/**
2* DO NOT EDIT THIS FILE.
3* See the following change record for more information,
4* https://www.drupal.org/node/2815083
5* @preserve
6**/
7
8if (typeof Object.assign !== 'function') {
9  Object.defineProperty(Object, 'assign', {
10    value: function assign(target, varArgs) {
11      'use strict';
12
13      if (target === null || target === undefined) {
14        throw new TypeError('Cannot convert undefined or null to object');
15      }
16
17      var to = Object(target);
18
19      for (var index = 1; index < arguments.length; index++) {
20        var nextSource = arguments[index];
21
22        if (nextSource !== null && nextSource !== undefined) {
23          for (var nextKey in nextSource) {
24            if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
25              to[nextKey] = nextSource[nextKey];
26            }
27          }
28        }
29      }
30      return to;
31    },
32    writable: true,
33    configurable: true
34  });
35}