src/vs/workbench/contrib/notebook/browser/notebookExecutionStateServiceImpl.ts/NotebookExecutionStateService/forceCancelNotebookExecutions
class NotebookExecutionStateService:	forceCancelNotebookExecutions(notebookUri: URI): void {
		const notebookExecutions = this._executions.get(notebookUri);
		if (!notebookExecutions) {
			return;
		}

		for (const exe of notebookExecutions.values()) {
			this._onCellExecutionDidComplete(notebookUri, exe.cellHandle, exe);
		}
	}