src/vs/workbench/contrib/notebook/browser/view/notebookCellList.ts/NotebookCellList/visibleRanges
class NotebookCellList:	set visibleRanges(ranges: ICellRange[]) {
		if (cellRangesEqual(this._visibleRanges, ranges)) {
			return;
		}

		this._visibleRanges = ranges;
		this._onDidChangeVisibleRanges.fire();
	}