void gtk_tree_model_sort_reset_default_sort_func ( GtkTreeModelSort* tree_model_sort )
This resets the default sort function to be in the “unsorted” state. That
is, it is in the same order as the child model. It will re-sort the model
to be in the same order as the child model only if the
is in “unsorted” state.
Deprecated since: 4.10
Please do not use it in newly written code.