module Callstack:sig
..end
include Datatype.S_with_collections
val pretty_debug : Stdlib.Format.formatter -> t -> unit
val pretty_hash : Stdlib.Format.formatter -> t -> unit
Print a hash of the callstack when '-kernel-msg-key callstack' is enabled (prints nothing otherwise).
val pretty_short : Stdlib.Format.formatter -> t -> unit
Print a call stack without displaying call sites.