Returns a newly-created [GtkTreePath-struct|GtkTreePath-struct] referenced by iter.
This path should be freed with TreePath.free.
the [GtkTreeIter-struct|GtkTreeIter-struct]
a newly-created [GtkTreePath-struct|GtkTreePath-struct]
Returns a newly-created [GtkTreePath-struct|GtkTreePath-struct] referenced by iter.
This path should be freed with TreePath.free.