Bug 581597 - [Robotics, ROS2] Support callback groups

- avoid NPE in case of unconnected ports

Change-Id: Ia62eb0712773adb168ce8614eaf19dc7fdffae3d
Signed-off-by: aradermache <ansgar.radermacher@cea.fr>
1 file changed
tree: d071cf7e8506c21601c057940f49419443d92fa0
  1. plugins/
  2. releng/
  3. targetplatform/
  4. .gitignore
  5. pom.xml