Vaadin 8 Grid and Entities with OneToMany and OneToOne relationships

Hi,
i have a grid that is init with a beanType like Grid<Person> grid = new Grid<>();

Person has a one to one and a one to many relationships to other objects. 
My solution so far:

addColumn((Person person) ->{ return person.getGroup().getGroupName()},new TextRenderer());

What is the best way to show this relationship information in the grid ?

If your Group object overrides the toString() method with "return getGroupName()",

addColumn(Person::getGroup()) should do the trick. 

Is there any other way to do this ?  Or is this the way how to hande relationships in the Grid.

I am looking for something like in Vaaind 7 

ds.addNestedContainerBean("group")

as shown in this vaadin blog
https://vaadin.com/blog/-/blogs/using-vaadin-grid