gboolean show_files);
void _gtk_file_system_model_set_filter_folders (GtkFileSystemModel *model,
gboolean show_folders);
-void _gtk_file_system_model_freeze_updates (GtkFileSystemModel *model);
-void _gtk_file_system_model_thaw_updates (GtkFileSystemModel *model);
void _gtk_file_system_model_clear_cache (GtkFileSystemModel *model,
int column);