src/vs/workbench/contrib/notebook/browser/view/notebookCellList.ts/getVisibleCells
function getVisibleCells(cells: CellViewModel[], hiddenRanges: ICellRange[]) {
	if (!hiddenRanges.length) {
		return cells;
	}

	let start = 0;
	let hiddenRangeIndex = 0;
	const result: CellViewModel[] = [];

	while (start < cells.length && hiddenRangeIndex < hiddenRanges.length) {
		if (start < hiddenRanges[hiddenRangeIndex].start) {
			result.push(...cells.slice(start, hiddenRanges[hiddenRangeIndex].start));
		}

		start = hiddenRanges[hiddenRangeIndex].end + 1;
		hiddenRangeIndex++;
	}

	if (start < cells.length) {
		result.push(...cells.slice(start));
	}

	return result;
}