[gtkmm] TreeModelColumn associated with a TreeViewColumn ?

[Liza Klerck <liza trdlnk com>]

Hi,
How do I retrieve the Gtk::TreeViewColumn associated with a 
Gtk::TreeModelColumn after the TreeViewColumn has already been created ?
Something like this:

Gtk::TreeModelColumn<bool> my_model_column1;
Gtk::TreeModelColumn<bool> my_model_column2;

//So then create 2 Gtk::TreeViewColumns by using
TreeView::append_column("Column1", my_model_column1);
TreeView::append_column("Column2", my_model_column2);

Later on in the code I receive a callback of some sort and I have a
void CallBack(TreeViewColumn *x)
{
    I want to know if x is the TreeViewColumn I associated with 
my_model_column1 or  my_model_column2 ?
} 

Thanks !
Liza