+GVariant * g_settings_backend_read (GSettingsBackend *backend,
+ const gchar *key,
+ const GVariantType *expected_type,
+ gboolean default_value);
+GVariant * g_settings_backend_read_user_value (GSettingsBackend *backend,
+ const gchar *key,
+ const GVariantType *expected_type);
+gboolean g_settings_backend_write (GSettingsBackend *backend,
+ const gchar *key,
+ GVariant *value,
+ gpointer origin_tag);
+gboolean g_settings_backend_write_tree (GSettingsBackend *backend,
+ GTree *tree,
+ gpointer origin_tag);
+void g_settings_backend_reset (GSettingsBackend *backend,
+ const gchar *key,
+ gpointer origin_tag);
+gboolean g_settings_backend_get_writable (GSettingsBackend *backend,
+ const char *key);
+void g_settings_backend_unsubscribe (GSettingsBackend *backend,
+ const char *name);
+void g_settings_backend_subscribe (GSettingsBackend *backend,
+ const char *name);
+GPermission * g_settings_backend_get_permission (GSettingsBackend *backend,
+ const gchar *path);
+void g_settings_backend_sync_default (void);