null;
            currentLeftTable.snapshot(currentRightTable, doInitialSnapshotInput.checked, stampColumns).then(frozenTable => {
                    openFrozenTable(frozenTable);
                }
            );
        }
    };
    document.getElementById('start_frozen').onclick = () => {
        if (frozenOffset > 0) {
            frozenOffset = 0;
            load(currentFrozenTable, frozenOffset);
        }
    };
    document.getElementById('prev_frozen').onclick = () => {
        if (frozenOffset > 