Method DebugString

extensions/select_optimization_test.cc:237–240

class MockAccessApis : public LegacyTypeInfoApis, public LegacyTypeAccessApis {
 public:
  std::string DebugString(
      const MessageWrapper& wrapped_message) const override {
    return "MockAccessApis";
  }

  absl::string_view GetTypename(
      const MessageWrapper& wrapped_message) const override {