Sets @filter_iter to point to the row in @filter that corresponds to the row pointed at by @child_iter. If @filter_iter was not set, %FALSE is returned.
An uninitialized #GtkTreeIter.
A valid #GtkTreeIter pointing to a row on the child model.
Return: %TRUE, if @filter_iter was set, i.e. if @child_iter is a valid iterator pointing to a visible row in child model.
2.4
See Implementation
Sets @filter_iter to point to the row in @filter that corresponds to the row pointed at by @child_iter. If @filter_iter was not set, %FALSE is returned.