src/vs/workbench/contrib/notebook/browser/view/notebookCellList.ts/ListViewInfoAccessor/getVisibleRangesPlusViewportAboveAndBelow
class ListViewInfoAccessor:	getVisibleRangesPlusViewportAboveAndBelow(): ICellRange[] {
		return this.list?.getVisibleRangesPlusViewportAboveAndBelow() ?? [];
	}