code: def register_output_renderer(datasette):
      return [
          {
              "extension": "testall",
              "render": render_test_all_parameters,
              "can_render": can_render,
          },
          {
              "extension": "testnone",
              "callback": render_test_no_parameters,
          },
          {"extension": "testresponse", "render": render_response},
      ]
  
imports: from datasette import hookimpl
  from datasette.utils.asgi import Response
  import json
label_desc: Use image node_id 2 for calling a global function with example usage: register_output_renderer(datasette) and returns: list