Mapped types with `as` do not apply the remapping

[justarandomgeek]

---@class (partial) EventDataMap
---@field on_achievement_gained EventData.on_achievement_gained
---@field on_ai_command_completed EventData.on_ai_command_completed
---@field on_segmented_unit_died EventData.on_segmented_unit_died
--- like 300 more...

---@class EventToken<E:string>

---@class events<M: EventDataMap = EventDataMap>: {[E in keyof M as E|EventToken<E>]?: fun(e:M[E])}

the as E|EventToken<E> is highlighted correctly, but the remapping of the keys seems to be totally ignored by type checking/hinting. as EventToken<E> is similarly ineffective.

[xuhuanzy]

as in mapping types has not yet been implemented.