[ros-users] [Discourse.ros.org] [Next Generation ROS] Syncronized callbacks in ROS2

[Hunter L. Allen]

@Peter9606 usually we do a port on a branch, then PR into `ros2`.

If you are porting, do keep in mind that some of the changes can be upstreamed, so they should be done in separate commits (`package.xml` migration, `tf2` migration, de-boostifying, etc) and a PR likely filed upstream so that the ROS1 side of things can be improved.





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