code: function updated(docs) {
      // Refresh if any of the objects: have an ID which is in our results OR they match our query (this.query)
      var shouldRefresh = false;
      docs.forEach(function(doc) { // Avoid using .some since it would stop iterating after first match and we need to set _prefetched
        var interested = self._count || self._ids[doc._id] || document.match(doc, self.query); // _count queries never set _ids
        if (interested) self._prefetched[doc._id] = doc;
        shouldRefresh = shouldRefresh || interested;
      });
      if (shouldRefresh) refresh();
    }
docs: Watch for changes