Golang Protobuff Message Copy Function

example.go

package main

import (
	"fmt"
	"google.golang.org/protobuf/proto"
	// type proto.Message interface { ....
	// func proto.Merge(dst, src Message)
	"[...]/foo"
	// syntax = "proto3";
	// message Foo {
	//     int32 value = 1;
	// }
)

// Is this the best way to do this?  Can I make this better?
// Can I specify that *T must satisfy proto.Message?
func CopyProtoMessage[T any](src *T) (dst T) {
	if srcMsg, ok := any(src).(proto.Message); ok {
		if dstMsg, ok := any(&dst).(proto.Message); ok {
			proto.Merge(dstMsg, srcMsg)
		}
	}
	return
}

func main() {
	f1 := foo.Foo{Value: 100}

	f2 := CopyProtoMessage(&f1)
	fmt.Printf("%d\n", f2.Value)

	f3 := f1 // go-vet: assignment copies lock value to f3: [...]/foo.Foo contains
	// google.golang.org/protobuf/internal/impl.MessageState contains sync.Mutex
	fmt.Printf("%d\n", f3.Value)
}