[gnome-panel] doc: include object hierarchy

[Alberts Muktupāvels <muktupavels src gnome org>]

commit e57f33ad4240930d9baa349cb038e61ad656653c
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sat Sep 12 02:25:18 2015 +0300

    doc: include object hierarchy

 doc/reference/panel-applet/panel-applet-docs.xml |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/doc/reference/panel-applet/panel-applet-docs.xml 
b/doc/reference/panel-applet/panel-applet-docs.xml
index 5df76e8..1c1df58 100644
--- a/doc/reference/panel-applet/panel-applet-docs.xml
+++ b/doc/reference/panel-applet/panel-applet-docs.xml
@@ -1371,6 +1371,11 @@ PanelApplet.Applet.factory_main("HelloWorldFactory",
     <xi:include href="xml/applet-factory.xml"/>
   </part>
 
+  <chapter id="object-tree">
+    <title>Object Hierarchy</title>
+    <xi:include href="xml/tree_index.sgml"/>
+  </chapter>
+
   <index id="api-index-full">
     <title>API Index</title>
     <xi:include href="xml/api-index-full.xml"><xi:fallback /></xi:include>