gnome-control-center/panels/sound/cc-stream-row.ui

<?xml version="1.0" encoding="UTF-8"?>
<interface>
  <!-- interface-requires gtk+ 3.0 -->
  <template class="CcStreamRow" parent="GtkListBoxRow">
    <child>
      <object class="GtkBox">
        <property name="visible">True</property>
        <property name="margin">12</property>
        <property name="spacing">12</property>
        <child>
          <object class="GtkBox" id="label_box">
            <property name="visible">True</property>
            <property name="spacing">6</property>
              <child>
                <object class="GtkImage" id="icon_image">
                  <property name="visible">True</property>
                  <style>
                    <class name="lowres-icon"/>
		  </style>
                </object>
              </child>
              <child>
                <object class="GtkLabel" id="name_label">
                  <property name="visible">True</property>
                  <property name="ellipsize">end</property>
                  <property name="xalign">0</property>
                </object>
              </child>
          </object>
        </child>
        <child>
          <object class="CcVolumeSlider" id="volume_slider">
            <property name="visible">True</property>
            <property name="hexpand">True</property>
          </object>
        </child>
      </object>
    </child>
  </template>
</interface>