[Gtk-sharp-list] Treeview holding tree of objects (with embedded collection inside)

[Jon García de Salazar Bilbao]

Hi,
I'm trying to figure out how to use best my treeview to represent my
app data. I want the TreeStore to hold objects (not strings) in order to
make my front end more simple. The objects I hold contain collections
of other objects that I'd like to visualize too, thus I could access the
different methods provided by every object (objects and subojects) selected
in the treeview pretty easily.

[-] Object1
   Subobject1
   Subobject2
[+] Object2
[-] Object3
    Subobject1
    ...

I decided to do it like this:

store = new TreeStore(typeof(IObject));

foreach (IObject object in ...)
{
store.AppendValues(object);
}

column.SetCellDataFunc(device_cell, new TreeCellDataFunc(RenderObject));

But I do not know how to render Subobjects in the tree? Should I try 
something like this?

class Object : IItem {...}
class Suboject : IItem {...}

tore = new TreeStore(typeof(IItem));

foreach(IItem object in ...)
{
    TreeIter iter = store.AppendValues(object);
    foreach (IItem suboject in object...)
    {
        store.AppendValues(iter, subobject);
    }
}

column.SetCellDataFunc(device_cell, new TreeCellDataFunc(RenderItem));

Is there a right way to get my tree to manage those kinds of objects easily?
Thanks in advance, Jon.