Function leakStore

lib/web/polyfill.js:1693–1695

(that)

    } return that;
  }
  function leakStore(that){
    return that[LEAK] || hidden(that, LEAK, new Map)[LEAK];
  }
  
  var weakMethods = {
    // 23.3.3.2 WeakMap.prototype.delete(key)