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'use strict';
require('../../modules/es.map');
require('../../modules/esnext.map.key-by');
var path = require('../../internals/path');
var Map = path.Map;
var mapKeyBy = Map.keyBy;
module.exports = function keyBy(source, iterable, keyDerivative) {
return mapKeyBy.call(typeof this === 'function' ? this : Map, source, iterable, keyDerivative);
};