code: def test_recursive():
      from .app_pv1 import app
  
      client = TestClient(app)
      response = client.get("/items/recursive")
      assert response.status_code == 200, response.text
      assert response.json() == {
          "sub_items": [{"name": "subitem", "sub_items": []}],
          "name": "item",
      }
  
      response = client.get("/items/recursive-submodel")
      assert response.status_code == 200, response.text
      assert response.json() == {
          "name": "item",
          "sub_items1": [
              {
                  "name": "subitem",
                  "sub_items2": [
                      {
                          "name": "subsubitem",
                          "sub_items1": [
                              {
                                  "name": "subsubsubitem",
                                  "sub_items2": [],
                              }
                          ],
                      }
                  ],
              }
          ],
      }
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_recursive() without return types