the pending host writes, as [start, stop)
50family ArenaRanges : Type 0
51constructor ArenaRangesNone
52constructor ArenaRangesNext
53field unrestricted arenaRangeStart : Nat
54field unrestricted arenaRangeStop : Nat
55recursive unrestricted arenaRangesTailThe compiler supplied declaration spans and resolved links from this source snapshot. This page does not assert that this file belongs to a checked closure.