src/vs/workbench/contrib/notebook/browser/notebookEditorKernelManager.ts/NotebookEditorKernelManager/getSelectedOrSuggestedKernel
class NotebookEditorKernelManager:	getSelectedOrSuggestedKernel(notebook: INotebookTextModel): INotebookKernel | undefined {
		// returns SELECTED or the ONLY available kernel
		const info = this._notebookKernelService.getMatchingKernel(notebook);
		return info.selected ?? info.suggested;
	}