Sets filter_iter to point to the row in this that corresponds to the row pointed at by
child_iter.
If filter_iter was not set, false is returned.
| this |
A `GtkTreeModelFilter` |
| filter_iter |
An uninitialized `GtkTreeIter` |
| child_iter |
A valid `GtkTreeIter` pointing to a row on the child model. |
|
true, if |