code: function (storageType) {
  
              var isStorageType = typeof storageType === 'undefined' ? false : true;
  
              var key,
                  keys = [];
  
              if (isStorageType) {
                  webStorage = $window[storageType];
                  for (key in webStorage) {
                      keys.push(key);
                  }
              } else {
                  webStorage = $window.localStorage;
                  for (key in webStorage) {
                      keys.push(key);
                  }
                  webStorage = $window.sessionStorage;
                  for (key in webStorage) {
                      if (keys.indexOf(key) == -1) keys.push(key);
                  }
              }
  
              return keys;
          }
docs: /*
  Return array of keys from storage
  - storageType: *optional* localStorage or sessionStorage