|                          |  | 'use strict';
var Cache = module.exports = function Cache() {  this._cache = {};};
Cache.prototype.put = function Cache_put(key, value) {  this._cache[key] = value;};
Cache.prototype.get = function Cache_get(key) {  return this._cache[key];};
Cache.prototype.del = function Cache_del(key) {  delete this._cache[key];};
Cache.prototype.clear = function Cache_clear() {  this._cache = {};};
 |