Method MatcherInterfaceAdapter

tests/gtest/gtest.h:9092–9093

class MatcherInterfaceAdapter : public MatcherInterface<const T&> {
 public:
  explicit MatcherInterfaceAdapter(const MatcherInterface<T>* impl)
      : impl_(impl) {}
  ~MatcherInterfaceAdapter() override { delete impl_; }

  void DescribeTo(::std::ostream* os) const override { impl_->DescribeTo(os); }