code: func NewSafeFormatAndMountFromHost(pluginName string, host volume.VolumeHost) *mount.SafeFormatAndMount {
  	mounter := host.GetMounter(pluginName)
  	exec := host.GetExec(pluginName)
  	return &mount.SafeFormatAndMount{Interface: mounter, Exec: exec}
  }
docs: // NewSafeFormatAndMountFromHost creates a new SafeFormatAndMount with Mounter
  // and Exec taken from given VolumeHost.