*     very rare. Note that if backward conversion is not only unimplemented but
   *     unimplement<i>able</i> (for example, consider a {@code Converter<Chicken, ChickenNugget>}),
   *     then this is not logically a {@code Converter} at all, and should just implement {@link
   *     Function}.
   */
  @ForOverride
  protected abstract A doBackward(B b);

   *     very rare. Note that if backward conversion is not only unimplemented but
   *     unimplement<i>able</i> (for example, consider a {@code Converter<Chicken, ChickenNugget>}),
   *     then this is not logically a {@code Converter} at all, and should just implement {@link
   *     Function}.
   */
  @ForOverride
  protected abstract A doBackward(B b);

	})

	if err != nil {
		stat, ok := status.FromError(err)
		if ok {
			switch stat.Code() {
			case codes.Unimplemented:
				klog.V(4).ErrorS(err, "server does not implement the grpc health protocol (grpc.health.v1.Health)", "addr", addr, "service", service)
				return probe.Failure, fmt.Sprintf("error: this server does not implement the grpc health protocol (grpc.health.v1.Health): %s", stat.Message()), nil
			case codes.DeadlineExceeded:

    return absl::OkStatus();
  }

  Status RegisterFunction(AbstractFunction* func) override {
    return errors::Unimplemented(
        "Registering graph functions has not been implemented yet.");
  }

  Status RemoveFunction(const string& func) override {
    return errors::Unimplemented(
        "GraphContext::RemoveFunction has not been implemented yet.");
  }
  // For LLVM style RTTI.

                                     size_t length) {
  return Unimplemented("SetAttrString has not been implemented yet.");
}
Status MlirAbstractOp::SetAttrInt(const char* attr_name, int64_t value) {
  return Unimplemented("SetAttrInt has not been implemented yet.");
}
Status MlirAbstractOp::SetAttrFloat(const char* attr_name, float value) {
  return Unimplemented("SetAttrFloat has not been implemented yet.");
}

// [ExecerContext], [QueryerContext], [ConnPrepareContext], and [ConnBeginTx].
//
// To support custom data types, implement [NamedValueChecker]. [NamedValueChecker]
// also allows queries to accept per-query options as a parameter by returning
// [ErrRemoveArgument] from CheckNamedValue.
//
// If multiple result sets are supported, [Rows] should implement [RowsNextResultSet].

	return nil, fmt.Errorf("unimplemented")
}

func (envoyFilterGenerator) extendedPrincipal(_ string, _ []string, _ bool) (*rbacpb.Principal, error) {
	return nil, fmt.Errorf("unimplemented")
}

type srcIPGenerator struct{}

func (srcIPGenerator) permission(_, _ string, _ bool) (*rbacpb.Permission, error) {
	return nil, fmt.Errorf("unimplemented")
}

	lsa, _ := lrsa.Sockaddr()
	rsa, _ := rrsa.Sockaddr()

	netfd.setAddr(netfd.addrFunc()(lsa), netfd.addrFunc()(rsa))
	return netfd, nil
}

// Unimplemented functions.

func (fd *netFD) dup() (*os.File, error) {
	// TODO: Implement this, perhaps using internal/poll.DupCloseOnExec.
	return nil, syscall.EWINDOWS

template <GTEST_$(n)_TYPENAMES_(T), GTEST_$(n)_TYPENAMES_(U)>
inline bool operator!=(const GTEST_$(n)_TUPLE_(T)& t,
                       const GTEST_$(n)_TUPLE_(U)& u) { return !(t == u); }

// 6.1.4 Pairs.
// Unimplemented.

}  // namespace tr1
}  // namespace std


$for j [[
#undef GTEST_$(j)_TUPLE_

]]


$for j [[
#undef GTEST_$(j)_TYPENAMES_

]]

 * <li>Implementations must be thread-safe.
 * <li>Implementations should implement {@link InternalInvalidatableVirtualFileSystemConnection}. This is used by all consumer versions from 6.1.
 * <li>Implementations should implement {@link org.gradle.tooling.internal.protocol.test.InternalTestExecutionConnection}. This is used by all consumer versions from 2.6-rc-1.