Is dynamic topic remapping implemented in ROS2 Dashing?

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Based on the documentation I have seen at the links below

https://design.ros2.org/articles/stat... (bottom of page)

https://www.osrfoundation.org/wordpre... (slides 23 -24)

It seems ros2 nodes are supposed to support dynamic remapping of their topics at runtime. However, I do not see any documentation on this. I feel this feature is useful during development and debugging, so I would like to see it implemented.

Is this feature implemented in Dashing? If not, is it still on the roadmap?