src/vs/workbench/contrib/notebook/common/model/cellEdit.ts/SpliceCellsEdit/redo
class SpliceCellsEdit:	redo(): void {
		if (!this.editingDelegate.replaceCell) {
			throw new Error('Notebook Replace Cell not implemented for Undo/Redo');
		}

		this.diffs.reverse().forEach(diff => {
			this.editingDelegate.replaceCell!(diff[0], diff[1].length, diff[2], this.endHandles);
		});
	}