<programlisting>
    (declare-simple-method org_freedesktop_DBus_Introspectable:Introspect
      (&lt;g-dbus-connection&gt;
       &lt;string&gt;
       &lt;string&gt;
       &lt;g-dbus-call-flags&gt;
       &lt;integer&gt;
       (:alt-maybe &lt;g-cancellable&gt;))
      &lt;string&gt;
      nonpure)
</programlisting>
