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: mounter.go
    path of file: ./repos/client/go/kbfs/libdokan
    
    the code of the file until where you have to start completion: // Copyright 2016 Keybase Inc. All rights reserved.
// Use of this source code is governed by a BSD
// license that can be found in the LICENSE file.

package libdokan

import (
	"time"

	"github.com/keybase/client/go/kbfs/dokan"
	"github.com/keybase/client/go/logger"
)

type mounter struct {
	options StartOptions
	c       *dokan.MountHandle
	log     logger.Logger
}

func (m *mounter) Unmount() error { return m.c.Close() }

func (m *mounter) Mount() (err error) {
	// Re
    
func (m *mounter) Mount() (err error) {
	// Retry loop
	for i := 8; true; i *= 2 {
		m.c, err = dokan.Mount(&m.options.DokanConfig)
		// break if success, no force or too many tries.
		if err == nil || i > 128 {
			break
		}
		m.log.Errorf("Failed to mount dokan filesystem (i=%d): %v", i, err)
		// Sleep two times 800ms, 1.6s, 3.2s, ...
		time.Sleep(time.Duration(i) * 100 * time.Millisecond)
		if m.options.ForceMount {
			err = dokan.Unmount(m.options.DokanConfig.Path)
			if err != nil {
				m.log.Errorf("Failed to unmount dokan filesystem (i=%d): %v",
					i, err)
			}
			time.Sleep(time.Duration(i) * 100 * time.Millisecond)
		}
	}
	return err
}