Specifies the type of function passed to glib.global.datasetForeach. It is called with each #GQuark id and associated data element, together with the user_data parameter supplied to glib.global.datasetForeach.
Specifies the type of function passed to glib.global.datasetForeach. It is called with each #GQuark id and associated data element, together with the user_data parameter supplied to glib.global.datasetForeach.