gtk.TreeIter — An object that points at a path in a gtk.TreeModel.
A gtk.TreeIter is an
object that points at a path in a gtk.TreeModel. A
gtk.TreeIter
is created using one of the gtk.TreeModel or
gtk.TreeModelSort 
methods:
    def copy()| Returns : | a copy of the treeiter. | 
The copy() method returns a copy of the
treeiter. This iter must be freed  with the free()
method.
    def free()This method is deprecated and should not be used since it can crash your application.
The free() method frees a gtk.TreeIter.