code: def check_results(self, flow, checker):
      for step in flow:
          checker.assert_artifact(step.name, "additional_value", 42)
          checker.assert_artifact(step.name, "tl_value", 42)
          checker.assert_artifact(step.name, "plugin_value", 42)
          checker.assert_artifact(
              step.name, "plugin_set_value", step.name
          )
  
imports: from metaflow_test import MetaflowTest, ExpectationFailed, steps, tag
label_desc: Use image node_id 2 for calling the ExtensionsTest obj's underlying member method code with example usage: obj.check_results(flow, checker) without return types