state-trooper/perf/node_modules/core-js/modules/_object-forced-pam.js

Application State Manager

// Forced replacement prototype accessors methods
module.exports = require('./_library')|| !require('./_fails')(function(){
  var K = Math.random();
  // In FF throws only define methods
  __defineSetter__.call(null, K, function(){ /* empty */});
  delete require('./_global')[K];
});