RailPlannerPrototype::rails

[Osmo]

https://lua-api.factorio.com/latest/pro ... html#rails says

Entities must be rails and their first item-to-place must be this item.

however as boskid pointed out on discord:

i would not trust "their first item-to-place must be this item", given that even in the released version, elevated rails mod has rail ramp item which in itself is also a rail planner and builds all of the normal rails