public GroupList getGroupList(String label) {
        for (Hit hit : this) {
            if (!(hit instanceof GroupList list)) {
                continue;
            }
            if (!label.equals(list.getLabel())) {
                continue;
            }
            return list;
        }
        return null;
    }
Returns the {@link GroupList} with the given label. The label is the one given to the {@link
com.yahoo.search.grouping.request.EachOperation} that generated the list. This method returns null if no such
list was found.

@param label the label of the list to return
@return the requested list, or null
container-search/src/main/java/com/yahoo/search/grouping/result/Group.java