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'use strict';
var $ = require('../internals/export');
var IS_PURE = require('../internals/is-pure');
var anObject = require('../internals/an-object');
var getMapIterator = require('../internals/get-map-iterator');
var iterate = require('../internals/iterate');
// `Map.prototype.includes` method
// https://github.com/tc39/proposal-collection-methods
$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {
keyOf: function keyOf(searchElement) {
return iterate(getMapIterator(anObject(this)), function (key, value) {
if (value === searchElement) return iterate.stop(key);
}, undefined, true, true).result;
}
});