2 require('../../modules/es.map');
3 require('../../modules/esnext.map.group-by');
4 var call = require('../../internals/function-call');
5 var isCallable = require('../../internals/is-callable');
6 var path = require('../../internals/path');
9 var mapGroupBy = Map.groupBy;
11 module.exports = function groupBy(source, iterable, keyDerivative) {
12 return call(mapGroupBy, isCallable(this) ? this : Map, source, iterable, keyDerivative);