for (String group : model.getGroups()) {
            groups.putAll(group, model.getTasksForGroup(group));
        }
        String otherGroupName = findOtherGroup(groups.keySet());
        if (otherGroupName != null && groups.keySet().contains(DEFAULT_GROUP)) {
            groups.putAll(otherGroupName, groups.removeAll(DEFAULT_GROUP));
        }