code: def test_openapi_schema():
      response = client.get("/openapi.json")
      assert response.status_code == 200, response.text
      assert response.json() == {
          "openapi": "3.1.0",
          "info": {
              "title": "ChimichangApp",
              "summary": "Deadpool's favorite app. Nuff said.",
              "description": "\nChimichangApp API helps you do awesome stuff. 🚀\n\n## Items\n\nYou can **read items**.\n\n## Users\n\nYou will be able to:\n\n* **Create users** (_not implemented_).\n* **Read users** (_not implemented_).\n",
              "termsOfService": "http://example.com/terms/",
              "contact": {
                  "name": "Deadpoolio the Amazing",
                  "url": "http://x-force.example.com/contact/",
                  "email": "dp@x-force.example.com",
              },
              "license": {
                  "name": "Apache 2.0",
                  "identifier": "MIT",
              },
              "version": "0.0.1",
          },
          "paths": {
              "/items/": {
                  "get": {
                      "summary": "Read Items",
                      "operationId": "read_items_items__get",
                      "responses": {
                          "200": {
                              "description": "Successful Response",
                              "content": {
                                  "application/json": {"schema": {}}
                              },
                          }
                      },
                  }
              }
          },
      }
  
label_desc: Use image node_id 2 for calling a global function with example usage: test_openapi_schema() without return types