code: func (daemon *Daemon) defaultTarCopyOptions(noOverwriteDirNonDir bool) *archive.TarOptions {
  	return &archive.TarOptions{
  		NoOverwriteDirNonDir: noOverwriteDirNonDir,
  		UIDMaps:              daemon.idMapping.UIDs(),
  		GIDMaps:              daemon.idMapping.GIDs(),
  	}
  }
docs: // defaultTarCopyOptions is the setting that is used when unpacking an archive
  // for a copy API event.