public interface TaskReportModel {
    String DEFAULT_GROUP = "";

    /**
     * Returns the task groups which make up this model, in the order that they should be displayed.
     */
    Set<String> getGroups();

    /**
     * Returns the tasks for the given group, in the order that they should be displayed.
     */
    Set<TaskDetails> getTasksForGroup(String group);

                FileCollection sources = component.getCppSource();
                xcodeProject.getGroups().getSources().from(sources);

                FileCollection headers = component.getHeaderFiles();
                xcodeProject.getGroups().getHeaders().from(headers);

                // TODO - should use the _install_ task for an executable

            op.setRefreshPolicy(Constants.TRUE);
        });

        userBhv.selectCursor(cb -> cb.query().setGroups_Equal(group.getId()), entity -> {
            entity.setGroups(
                    stream(entity.getGroups()).get(stream -> stream.filter(s -> !s.equals(group.getId())).toArray(n -> new String[n])));
            userBhv.insertOrUpdate(entity);
        });

    }

        given: "a managed type that uses a read-write Set of strings"
        buildScript '''
            @Managed
            interface User {
                Set<String> getGroups()
                void setGroups(Set<String> groups)
            }

            model {
                user(User) {
                    def sortedSet = new TreeSet(['users', 'general'])
                    groups = sortedSet

	n := clen(buf[:])
	if n < 1 {
		return "", EINVAL
	}
	return string(buf[:n]), nil
}

/*
 * Wrapped
 */

//sysnb	getgroups(ngid int, gid *_Gid_t) (n int, err error)
//sysnb	setgroups(ngid int, gid *_Gid_t) (err error)

func Getgroups() (gids []int, err error) {
	n, err := getgroups(0, nil)
	if err != nil {
		return nil, err
	}
	if n == 0 {
		return nil, nil
	}

	if u == nil {
		return "", false
	}

	userName := u.GetName()
	if !strings.HasPrefix(userName, nodeUserNamePrefix) {
		return "", false
	}

	isNode := false
	for _, g := range u.GetGroups() {
		if g == user.NodesGroup {
			isNode = true
			break
		}
	}
	if !isNode {
		return "", false
	}

	nodeName := strings.TrimPrefix(userName, nodeUserNamePrefix)
	return nodeName, true

    private File locationDir;

    @Inject
    public DefaultXcodeProject(ObjectFactory objectFactory) {
        this.groups = objectFactory.newInstance(Groups.class);
    }

    public Groups getGroups() {
        return groups;
    }

    public List<XcodeTarget> getTargets() {
        return targets;
    }

    public Callable<List<TaskDependency>> getTaskDependencies() {

	if attr.GetUser() == nil {
		return authorizer.DecisionNoOpinion, "Error", errors.New("no user on request.")
	}
	for _, attr_group := range attr.GetUser().GetGroups() {
		for _, priv_group := range r.groups {
			if priv_group == attr_group {
				return authorizer.DecisionAllow, "", nil
			}
		}
	}
	return authorizer.DecisionNoOpinion, "", nil
}

	requestSubResource := attr.GetSubresource()
	aUserInfo := attr.GetUserInfo()
	userInfo := authenticationv1.UserInfo{
		Extra:    make(map[string]authenticationv1.ExtraValue),
		Groups:   aUserInfo.GetGroups(),
		UID:      aUserInfo.GetUID(),
		Username: aUserInfo.GetName(),
	}
	dryRun := attr.IsDryRun()

	// Convert the extra information in the user object
	for key, val := range aUserInfo.GetExtra() {

	n := clen(buf[:])
	if n < 1 {
		return "", EINVAL
	}
	return string(buf[:n]), nil
}

/*
 * Wrapped
 */

//sysnb	getgroups(ngid int, gid *_Gid_t) (n int, err error)
//sysnb	setgroups(ngid int, gid *_Gid_t) (err error)

func Getgroups() (gids []int, err error) {
	n, err := getgroups(0, nil)
	if err != nil {
		return nil, err
	}
	if n == 0 {
		return nil, nil
	}