--- /dev/null
+window1
+ "window"
+ index: 0
+ state: enabled resizable sensitive showing visible
+ toolkit: gtk
+ <AtkComponent>
+ layer: window
+ alpha: 1
+ headerbar1
+ "filler"
+ parent: window1
+ index: 0
+ state: enabled sensitive showing visible
+ toolkit: gtk
+ <AtkComponent>
+ layer: widget
+ alpha: 1
+ button1
+ "push button"
+ parent: headerbar1
+ index: 0
+ name: Yes
+ state: enabled focusable sensitive showing visible
+ toolkit: gtk
+ <AtkComponent>
+ layer: widget
+ alpha: 1
+ <AtkImage>
+ image size: -1 x -1
+ image description: (null)
+ <AtkAction>
+ action 0 name: click
+ action 0 description: Clicks the button
+ page2
+ "push button"
+ parent: headerbar1
+ index: 1
+ name: No
+ state: enabled focusable sensitive showing visible
+ toolkit: gtk
+ <AtkComponent>
+ layer: widget
+ alpha: 1
+ <AtkImage>
+ image size: -1 x -1
+ image description: (null)
+ <AtkAction>
+ action 0 name: click
+ action 0 description: Clicks the button
--- /dev/null
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+ <!-- interface-requires gtk+ 3.0 -->
+ <object class="GtkWindow" id="window1">
+ <property name="can_focus">False</property>
+ <property name="type">popup</property>
+ <child>
+ <object class="GtkHeaderBar" id="headerbar1">
+ <property name="visible">True</property>
+ <property name="title">Title</property>
+ <property name="subtitle">Subtitle</property>
+ <child>
+ <object class="GtkButton" id="button1">
+ <property name="label" translatable="yes">Yes</property>
+ <property name="visible">True</property>
+ </object>
+ <packing>
+ <property name="pack-type">start</property>
+ </packing>
+ </child>
+ <child>
+ <object class="GtkButton" id="page2">
+ <property name="label" translatable="yes">No</property>
+ <property name="visible">True</property>
+ </object>
+ <packing>
+ <property name="pack-type">end</property>
+ </packing>
+ </child>
+ </object>
+ </child>
+ </object>
+</interface>