code: func (c *defaultDiskCreator) Create(size int, publicSSHKeyPath, diskPath string) error {
  	log.Debugf("Creating %d MB hard disk image...", size)
  
  	tarBuf, err := mcnutils.MakeDiskImage(publicSSHKeyPath)
  	if err != nil {
  		return err
  	}
  
  	log.Debug("Calling inner createDiskImage")
  
  	return createDiskImage(diskPath, size, tarBuf)
  }
docs: // Make a boot2docker VM disk image.