[gnome-builder] libide/editor: handle IdeEditorPageAddin which are GActionGroup

[Christian Hergert <chergert src gnome org>]

commit eb0e01299c711b1a48b4f943b36b9fcb3466e66a
Author: Christian Hergert <chergert redhat com>
Date:   Thu Sep 15 14:18:50 2022 -0700

    libide/editor: handle IdeEditorPageAddin which are GActionGroup
    
    This just simplifies implementing the addins since you can use
    IDE_DEFINE_ACTION_GROUP() to implement the action group directly on the
    addin object.

 src/libide/editor/ide-editor-page-addin.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/src/libide/editor/ide-editor-page-addin.c b/src/libide/editor/ide-editor-page-addin.c
index 2347295e1..4b13eb7fa 100644
--- a/src/libide/editor/ide-editor-page-addin.c
+++ b/src/libide/editor/ide-editor-page-addin.c
@@ -29,9 +29,19 @@
 
 G_DEFINE_INTERFACE (IdeEditorPageAddin, ide_editor_page_addin, G_TYPE_OBJECT)
 
+static GActionGroup *
+ide_editor_page_addin_real_ref_action_group (IdeEditorPageAddin *addin)
+{
+  if (G_IS_ACTION_GROUP (addin))
+    return g_object_ref (G_ACTION_GROUP (addin));
+
+  return NULL;
+}
+
 static void
 ide_editor_page_addin_default_init (IdeEditorPageAddinInterface *iface)
 {
+  iface->ref_action_group = ide_editor_page_addin_real_ref_action_group;
 }
 
 void