// `Set.prototype.update` method
// https://github.com/tc39/proposal-collection-methods
$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {
update: function update(key, callback /* , thunk */) {
var map = anObject(this);
// `Set.prototype.update` method
// https://github.com/tc39/proposal-collection-methods
$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {
update: function update(key, callback /* , thunk */) {
var map = anObject(this);