gtk2/gtk/resources/ui/gtkactionbar.ui

<?xml version="1.0" encoding="UTF-8"?>
<interface domain="gtk30">
  <!-- interface-requires gtk+ 3.10 -->
  <template class="GtkActionBar" parent="GtkBin">
    <property name="can_focus">False</property>
    <child>
      <object class="GtkRevealer" id="revealer">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <child>
          <object class="GtkFrame" id="frame">
            <property name="visible">True</property>
            <property name="can_focus">False</property>
            <style>
              <class name="action-bar"/>
            </style>
            <child>
              <object class="GtkBox" id="center_box">
                <property name="visible">True</property>
                <property name="orientation">horizontal</property>
                <property name="can_focus">False</property>
                <property name="border_width">0</property>
                <property name="spacing">6</property>
              </object>
            </child>
          </object>
        </child>
      </object>
    </child>
  </template>
</interface>