The radius_visualisation_specification property links to RadiusVisualisationSpecification, but that page does not exist.
Edit: Same problem for water_reflection
[0.18.18] Broken link in documentation
Re: [0.18.18] Broken link in documentation
These two types weren't documented yet. They are documented now though :)
I'm an admin over at https://wiki.factorio.com. Feel free to contact me if there's anything wrong (or right) with it.