public void columnRoles() {
            doColumn("roles");
        }

        public void columnRoomNumber() {
            doColumn("roomNumber");
        }

        public void columnState() {
            doColumn("state");
        }

        public void columnStreet() {
            doColumn("street");
        }

        public void columnSurname() {
            doColumn("surname");

    public ColumnInfo columnRoles() {
        return _columnRoles;
    }

    public ColumnInfo columnRoomNumber() {
        return _columnRoomNumber;
    }

    public ColumnInfo columnState() {
        return _columnState;
    }

    public ColumnInfo columnStreet() {
        return _columnStreet;
    }

    public ColumnInfo columnSurname() {
        return _columnSurname;
    }