Like the title says, is it possible to remap already remapped topics? So suppose you include another launch file in your main launch file and you want to remap some topics from the included launch file, but those topics have already been remapped in the include, which you don't want to change/cannot change. Is this possible and if so how? I tried a couple of different cases and nothing did work.

Example

talker.launch (with first remap)

<launch>
  <node pkg="node_example" type="talker" name="talker">
    <param name="a" value="1"/>
    <param name="b" value="2)"/>
    <param name="message" value="Hello World"/>
    <param name="rate" value="2.0"/>
    <remap from="example" to="chatter"/>
  </node>
</launch>

main.launch (with remap of remapped chatter) <- does not work

<launch>
  <remap from="/chatter" to="/foo"/>
  <include file="$(find node_example)/launch/talker.launch">
  </include>
</launch>

or main.launch <- does not work

<launch>
  <group>
    <remap from="/chatter" to="/foo"/>
    <include file="$(find node_example)/launch/talker.launch"/>
  </group>
</launch>

or main.launch <- does not work

<launch>
    <include file="$(find node_example)/launch/talker.launch"/>
    <remap from="/chatter" to="/foo"/>
</launch>

Still the topic is /chatter and not /foo.