code: function (item) {
          item.value.sort(function (a, b) {
              if (a.key < b.key) {
                  return -1;
              }
              /* istanbul ignore next */
              // Below line exists only for the sake of completeness. Generally the array will
              // always be sorted, and therefore it is impossible to get to this state in a test.
              return a.key > b.key ? 1 : 0;
          });
          return item;
      }
docs: A utility method to sort values of a persistable object or array, which is used when comparing current values with future values.