code: function(namespace, key, value, expiration) {
              var ckey = Cache.key(namespace, key);
              var ctime = (new Date()).getTime();
  
              if (expiration > 0) {
                  expiration = ctime + expiration * 1000;
              } else {
                  expiration = -1;
              }
  
              Storage.set(ckey, {
                  "expiration": expiration,
                  "value": value
              });
              return Cache.get(key);
          }
docs: Set a data in the cache
  
  @method get
  @param {string} namespace namespace for this key
  @param {string} key key of the data to cache
  @param {object} value value to store in teh cache associated to this key
  @param {number} [expiration] seconds before epiration of this value in the cache