Adding fields to Branch

private Group moderatorsGroup;

    /**
     * Returns a {@link Group} of moderators of this branch. This field is an extra information about moderators, since
     * we already have ACL records that explain what permissions groups have on branches, but this moderators group is
     * just for convenience - in order to easily work with moderators.
     *
     * @return a group of moderators for this branch
     */
    public Group getModeratorsGroup() {
        return moderatorsGroup;
    }

    /**
     * Sets a {@link Group} of moderators for this branch. This field is an extra information about moderators, since we
     * already have ACL records that explain what permissions groups have on branches, but this moderators group is just
     * for convenience - in order to easily work with moderators.
     *
     * @param moderatorsGroup a group of moderators for this branch
     */
    public void setModeratorsGroup(Group moderatorsGroup) {
        this.moderatorsGroup = moderatorsGroup;
    }