code: func (task *Task) UpdateMountPoints(cont *apicontainer.Container, vols []types.MountPoint) {
  	for _, mountPoint := range cont.MountPoints {
  		containerPath := getCanonicalPath(mountPoint.ContainerPath)
  		for _, vol := range vols {
  			if strings.Compare(vol.Destination, containerPath) == 0 ||
  				// /path/ -> /path or \path\ -> \path
  				strings.Compare(vol.Destination, strings.TrimRight(containerPath, string(filepath.Separator))) == 0 {
  				if hostVolume, exists := task.HostVolumeByName(mountPoint.SourceVolume); exists {
  					if empty, ok := hostVolume.(*taskresourcevolume.LocalDockerVolume); ok {
  						empty.HostPath = vol.Source
  					}
  				}
  			}
  		}
  	}
  }
docs: // UpdateMountPoints updates the mount points of volumes that were created
  // without specifying a host path.  This is used as part of the empty host
  // volume feature.