[gtkmm] TreeModel question

[Benoît Touron <B Touron citb bull net>]

Hi !

First of all, thanks to Chris, Paulo and the other for their clues about 
 my previons question (regarding threads).

Now, another issue:
I manage a treeView, containing 3 levels:
- the root level, managing a set of connections
- connections, managing hosts
- hosts

How can I remove a connection ? This means removing all the underlying 
hosts.
I iterate into connection nodes, then for each connection, I iterate 
into its host nodes.
When I remove a host node, the iterator seems invalid.

How can I do this ?
Thanks
Ben