code: function(record) {
          var grouper = this.view.store.groupers.first();
          if (grouper) {
              return this.groupCache[grouper.getGroupString(record)];
          }
      }
docs: Returns the group data object for the group to which the passed record belongs **if the Store is grouped**.
  
  @param {Ext.data.Model} record The record for which to return group information.
  @return {Object} A single group data block as returned from {@link Ext.data.Store#getGroups Store.getGroups}. Returns
  `undefined` if the Store is not grouped.