Pi.hasLe : LE ((i : ι) → α i)
[Meta.isDefEq.assign] ✅️ ?m i := α i
  [Meta.isDefEq.assign.beforeMkLambda] ?m [i] := α i
  [Meta.isDefEq.assign.checkTypes] ✅️ (?m : ι → Type ?u) := (α : ι → Type v)