<launch>
  <node pkg="rostopic" type="rostopic" name="rostopic_pub1" 
        args="pub -r 10 input1 std_msgs/String input"/>

  <node pkg="topic_tools" type="mux" name="mux_explicit" output="screen"
        args="output input"/>
  <test test-name="mux_services" pkg="test_topic_tools" type="test_mux_services.py"/>

</launch>

