src/vs/workbench/contrib/notebook/browser/notebookEditorKernelManager.ts/NotebookEditorKernelManager/cancelNotebookCells
class NotebookEditorKernelManager:	async cancelNotebookCells(notebook: INotebookTextModel, cells: Iterable<ICellViewModel>): Promise<void> {
		let kernel = this.getSelectedOrSuggestedKernel(notebook);
		if (kernel) {
			await kernel.cancelNotebookCellExecution(notebook.uri, Array.from(cells, cell => cell.handle));
		}
	}