code: def check_results(self, flow, checker):
      for step in flow:
          checker.assert_artifact(
              step.name, "myfile_txt", "Regular Text File"
          )
          checker.assert_artifact(
              step.name, "myfile_utf8", "UTF Text File \u5e74"
          )
          checker.assert_artifact(
              step.name,
              "myfile_binary",
              "UTF Text File \u5e74".encode(encoding="utf8"),
          )
      checker.assert_artifact(
          step.name, "myfile_overriden", "Override Text File"
      )
  
imports: from metaflow_test import MetaflowTest, ExpectationFailed, steps
label_desc: Use image node_id 2 for calling the BasicIncludeTest obj's underlying member method code with example usage: obj.check_results(flow, checker) without return types