<!-- test unregister methods of rospy topic API -->
<launch>
  <node name="talker" pkg="test_rospy" type="talker.py">
    <remap from="chatter" to="test_unsubscribe_chatter" />
  </node>
  <node name="listener" pkg="test_rospy" type="listener.py">
    <remap from="chatter" to="test_unpublish_chatter" />
  </node>
  <test test-name="rospy_deregister" pkg="test_rospy" type="test_deregister.py" />
</launch>
