Function getWellKnownSymbol

lib/web/polyfill.js:382–384

(name, setter)

  return SYMBOL + '(' + key + ')_' + (++sid + random())[TO_STRING](36);
}
function getWellKnownSymbol(name, setter){
  return (Symbol && Symbol[name]) || (setter ? Symbol : safeSymbol)(SYMBOL + DOT + name);
}
// The engine works fine with descriptors? Thank's IE8 for his funny defineProperty.
var DESC = !!function(){
      try {