text: var assert = require('assert');
  var writableSymbol = require('@kingjs/descriptor.object.writable-symbol');
  
  function isFrozen() {
    if (Object.isFrozen(this)) {
      assert(writableSymbol in this == false);
      return true;
    }
      
    if (writableSymbol in this)
      return false;
  
    return true;
  }
  
  Object.defineProperties(module, {
    exports: { value: isFrozen }
  });