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node_modules/core-js/full/map/from.js

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+'use strict';
+require('../../modules/es.array.iterator');
+require('../../modules/es.map');
+require('../../modules/es.string.iterator');
+require('../../modules/esnext.map.from');
+require('../../modules/web.dom-collections.iterator');
+var call = require('../../internals/function-call');
+var isCallable = require('../../internals/is-callable');
+var path = require('../../internals/path');
+
+var Map = path.Map;
+var $from = Map.from;
+
+module.exports = function from(source, mapFn, thisArg) {
+  return call($from, isCallable(this) ? this : Map, source, mapFn, thisArg);
+};