src/vs/workbench/contrib/notebook/common/model/cellEdit.ts/CellMetadataEdit/redo
class CellMetadataEdit:	redo(): void | Promise<void> {
		if (!this.editingDelegate.updateCellMetadata) {
			return;
		}

		this.editingDelegate.updateCellMetadata(this.index, this.newMetadata);
	}