ValueProvider+RequestFactory - how to access properties of nested object?

[IgyBoy]

Hi everybody,

i'm trying to figure out how to display properties from related object in a grid.
Let's say I have entity object called "Song",that is relating to "Genre" object.

Now,what I want to achieve is to display list of "Song" objects on grid,but also include some of the details from related "Genre" object.
From what I read on GXT 3.0, valueProviders should be able to do that, but I haven't found out how to do it.

So far,I have managed to do this without problem:

interface SongProxyProperties extends PropertyAccess<SongProxy> {

ModelKeyProvider<SongProxy> id();
ValueProvider<SongProxy, String> artist();
.
.
.
ValueProvider<GenreProxy, String> genre(); ?????????
}


Can anyone help me with this?

Tnx,
Igor