node_modules/jszip/node_modules/core-js/modules/es6.object.freeze.js

// 19.1.2.5 Object.freeze(O)
var isObject = require('./_is-object')
  , meta     = require('./_meta').onFreeze;

require('./_object-sap')('freeze', function($freeze){
  return function freeze(it){
    return $freeze && isObject(it) ? $freeze(meta(it)) : it;
  };
});