src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts/NotebookEditorWidget/getCellsInViewRange
class NotebookEditorWidget:	private getCellsInViewRange(fromInclusive: number, toInclusive: number): ICellViewModel[] {
		const selectedCellsInRange: ICellViewModel[] = [];
		for (let index = 0; index < this._list.length; ++index) {
			const cell = this._list.element(index);
			if (cell) {
				if ((index >= fromInclusive && index <= toInclusive) || (index >= toInclusive && index <= fromInclusive)) {
					selectedCellsInRange.push(cell);
				}
			}
		}
		return selectedCellsInRange;
	}