src/vs/workbench/contrib/notebook/browser/services/notebookServiceImpl.ts/NotebookService/getContributedNotebookTypes
class NotebookService:	getContributedNotebookTypes(resource?: URI): readonly NotebookProviderInfo[] {
		if (resource) {
			return this.notebookProviderInfoStore.getContributedNotebook(resource);
		}

		return [...this.notebookProviderInfoStore];
	}