src/vs/workbench/contrib/notebook/browser/viewParts/notebookKernelQuickPickStrategy.ts/isInstallExtensionPick
function isInstallExtensionPick(item: QuickPickInput<IQuickPickItem>): item is InstallExtensionPick {
	return item.id === 'installSuggested' && 'extensionId' in item;
}