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: func.go
    path of file: ./repos/mgmt/lang/funcs/funcgen
    
    the code of the file until where you have to start completion: // Mgmt
// Copyright (C) 2013-2024+ James Shubin and the project contributors
// Written by James Shubin <james@shubin.ca> and the project con
    
func (obj *function) Signature() (string, error) {
	var args []string
	for _, a := range obj.Args {
		mcl, err := a.ToMcl()
		if err != nil {
			return "", err
		}
		args = append(args, mcl)
	}
	var returns []string
	for _, a := range obj.Return {
		mcl, err := a.ToMcl()
		if err != nil {
			return "", err
		}
		returns = append(returns, mcl)
	}
	return fmt.Sprintf("func(%s) %s", strings.Join(args, ", "), returns[0]), nil
}