GtkTreeViewColumn get column id

["Hubert Sokolowski" <h sokolowski wsisiz edu pl>]

Hi!

I added a column to a treeview with
renderer = gtk_cell_renderer_text_new ();
column = gtk_tree_view_column_new_with_attributes (col_title,
                                                       renderer,
                                                       "text",
                                                       column_id,
                                                       NULL);
gtk_tree_view_append_column (treeview, column);


how to get the column id of a GtkTreeViewColumn? I can get a title, but I
see no function to get the column id.

regards
hs