+
+/**
+ * g_action_group_query_action:
+ * @action_group: a #GActionGroup
+ * @action_name: the name of an action in the group
+ * @enabled: (out): if the action is presently enabled
+ * @parameter_type: (out) (allow-none): the parameter type, or %NULL if none needed
+ * @state_type: (out) (allow-none): the state type, or %NULL if stateless
+ * @state_hint: (out) (allow-none): the state hint, or %NULL if none
+ * @state: (out) (allow-none): the current state, or %NULL if stateless
+ *
+ * Queries all aspects of the named action within an @action_group.
+ *
+ * This function acquires the information available from
+ * g_action_group_has_action(), g_action_group_get_action_enabled(),
+ * g_action_group_get_action_parameter_type(),
+ * g_action_group_get_action_state_type(),
+ * g_action_group_get_action_state_hint() and
+ * g_action_group_get_action_state() with a single function call.
+ *
+ * This provides two main benefits.
+ *
+ * The first is the improvement in efficiency that comes with not having
+ * to perform repeated lookups of the action in order to discover
+ * different things about it. The second is that implementing
+ * #GActionGroup can now be done by only overriding this one virtual
+ * function.
+ *
+ * The interface provides a default implementation of this function that
+ * calls the individual functions, as required, to fetch the
+ * information. The interface also provides default implementations of
+ * those functions that call this function. All implementations,
+ * therefore, must override either this function or all of the others.
+ *
+ * If the action exists, %TRUE is returned and any of the requested
+ * fields (as indicated by having a non-%NULL reference passed in) are
+ * filled. If the action doesn't exist, %FALSE is returned and the
+ * fields may or may not have been modified.
+ *
+ * Returns: %TRUE if the action exists, else %FALSE
+ *
+ * Since: 2.32
+ **/
+gboolean
+g_action_group_query_action (GActionGroup *action_group,
+ const gchar *action_name,
+ gboolean *enabled,
+ const GVariantType **parameter_type,
+ const GVariantType **state_type,
+ GVariant **state_hint,
+ GVariant **state)
+{
+ return G_ACTION_GROUP_GET_IFACE (action_group)
+ ->query_action (action_group, action_name, enabled, parameter_type, state_type, state_hint, state);
+}