}
        service = getProject().getExtensions().getByType(VagrantMachine.class);
    }

    @Input
    protected abstract List<String> getWindowsScript();

    @Input
    protected abstract List<String> getLinuxScript();

    @Input
    public UnaryOperator<String> getProgressHandler() {
        return progressHandler;
    }

    public List<String> getExtraArgs() {
        return extraArgs;
    }

    public void extraArg(String arg) {
        this.extraArgs.add(arg);
    }

    @Override
    protected List<String> getWindowsScript() {
        return getScript(true);
    }

    @Override
    protected List<String> getLinuxScript() {
        return getScript(false);
    }

    private List<String> getScript(boolean isWindows) {