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