src/vs/workbench/contrib/interactive/browser/interactiveEditor.ts/InteractiveEditor/getViewState
class InteractiveEditor:	override getViewState(): InteractiveEditorViewState | undefined {
		const input = this.input;
		if (!(input instanceof InteractiveEditorInput)) {
			return undefined;
		}

		this.#saveEditorViewState(input);
		return this.#loadNotebookEditorViewState(input);
	}