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Gantt Collapse/Expand at level is not working with enableVirtualization

Trying to implement custom toolbar element "expand at level" but function "expandAtLevel " working only with virtual scroll disabled. Is there are workaround to solve this?


See stack trace.

TypeError: Cannot read property 'querySelectorAll' of undefined

at GanttChart.expandCollapseChartRows (gantt-chart.js:725)

at GanttChart.expandedGanttRow (gantt-chart.js:686)

at GanttTreeGrid.expanded (tree-grid.js:234)

at Observer.notify (observer.js:99)

at TreeGrid.Base.trigger (base.js:181)

at Observer. (treegrid.js:2321)

at Observer.notify (observer.js:102)

at TreeGrid.Base.trigger (base.js:181)

at TreeGrid.expandRow (treegrid.js:2314)

at TreeGrid.expandAtLevel (treegrid.js:2386)

at GanttChart.expandAtLevel (gantt-chart.js:786)

at GanttComponent.Gantt.expandAtLevel (gantt.js:2042)

Thanks in advance for any solution.