Inlining_stats.Closure_stack
val create : unit -> t
val note_entering_closure : t -> closure_id:Closure_id.t -> dbg:Debuginfo.t -> t
val note_entering_call : t -> closure_id:Closure_id.t -> dbg:Debuginfo.t -> t
val note_entering_specialised : t -> closure_ids:Closure_id.Set.t -> t