public ColumnInfo columnReferer() {
        return _columnReferer;
    }

    public ColumnInfo columnRequestedAt() {
        return _columnRequestedAt;
    }

    public ColumnInfo columnResponseTime() {
        return _columnResponseTime;
    }

    public ColumnInfo columnRoles() {
        return _columnRoles;
    }

    public ColumnInfo columnSearchWord() {