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: dial_appengine.go
    path of file: ./repos/moby/vendor/google.golang.org/api/transport/grpc
    
    the code of the file until where you have to start completion: // Copyright 2016 Google LLC.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build appengine
    
func init() {
	// NOTE: dev_appserver doesn't currently support SSL.
	// When it does, this code can be removed.
	if appengine.IsDevAppServer() {
		return
	}

	appengineDialerHook = func(ctx context.Context) grpc.DialOption {
		return grpc.WithDialer(func(addr string, timeout time.Duration) (net.Conn, error) {
			return socket.DialTimeout(ctx, "tcp", addr, timeout)
		})
	}
}