dbus_bindings/dbus-service.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE node PUBLIC
 "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN"
 "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">

<node name="/org/freedesktop/DBus">
  <interface name="org.freedesktop.DBus">
    <method name="GetNameOwner">
      <arg name="name" direction="in" type="s" />
      <arg name="unique_name" direction="out" type="s" />
    </method>
    <signal name="NameOwnerChanged">
      <arg name="name" type="s" />
      <arg name="old_owner" type="s" />
      <arg name="new_owner" type="s" />
    </signal>
  </interface>
</node>