src/vs/workbench/contrib/notebook/browser/view/cellParts/cellExecution.ts/CellExecutionPart/updateExecutionOrder
class CellExecutionPart:	private updateExecutionOrder(internalMetadata: NotebookCellInternalMetadata): void {
		if (this._notebookEditor.activeKernel?.implementsExecutionOrder) {
			const executionOrderLabel = typeof internalMetadata.executionOrder === 'number' ?
				`[${internalMetadata.executionOrder}]` :
				'[ ]';
			this._executionOrderLabel.innerText = executionOrderLabel;
		} else {
			this._executionOrderLabel.innerText = '';
		}
	}