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: server_unsupported.go
    path of file: ./repos/podman/pkg/fileserver
    
    the code of the file until where you have to start completion: //go:build !windows

package fileserver

import (
	"fmt"
)

func StartShares(mounts map
    
func StartShares(mounts map[string]string) error {
	if len(mounts) == 0 {
		return nil
	}

	return fmt.Errorf("this platform does not support sharing directories")
}