if opts == nil {
		return "", nil
	}

	args := contextOptions(opts)
	if len(args) == 0 {
		return "", nil
	}

	processLabel, fileLabel, err := label.InitLabels(args)
	if err != nil {
		// In theory, this should be unreachable. InitLabels can fail only when args contain an unknown option,
		// and all options returned by contextOptions are known.
		return "", err
	}