* it uses the implementations that have been associated with it.
* Depending on the use case, it may use all implementations, or
* only the one with the highest priority, or pick a specific
- * one by name.
+ * one by name.
+ *
+ * To avoid opening all modules just to find out what extension
+ * points they implement, GIO makes use of a caching mechanism,
+ * see <link linkend="gio-querymodules">gio-querymodules</link>.
+ * You are expected to run this command after installing a
+ * GIO module.
*/
struct _GIOModule {
GTypeModule parent_instance;