lml-main/packages/cosmo-ui-build/node_modules/core-js/modules/_is-array.js

This is now a mono repository published into many standalone packages.

// 7.2.2 IsArray(argument)
var cof = require('./_cof');
module.exports = Array.isArray || function isArray(arg) {
  return cof(arg) == 'Array';
};