public ColumnInfo columnQueryOffset() {
        return _columnQueryOffset;
    }

    public ColumnInfo columnQueryPageSize() {
        return _columnQueryPageSize;
    }

    public ColumnInfo columnQueryTime() {
        return _columnQueryTime;
    }

    public ColumnInfo columnReferer() {
        return _columnReferer;
    }

    public ColumnInfo columnRequestedAt() {