You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: util.go
    path of file: ./repos/dapr/pkg/api/grpc
    
    the code of the file until where you have to start completion: /*
Copyright 2021 The Dapr Authors
Licensed under the Apache License, Version 2.0 (the "License
    
func stateConcurrencyToString(c commonv1pb.StateOptions_StateConcurrency) string {
	switch c {
	case commonv1pb.StateOptions_CONCURRENCY_FIRST_WRITE:
		return "first-write"
	case commonv1pb.StateOptions_CONCURRENCY_LAST_WRITE:
		return "last-write"
	}

	return ""
}