Key (email_message.email_message.kernel.Email_message

type t

val sexp_of_t : t -> Sexplib0.Sexp.t

include Core.Comparator.S
  with type t := t
  with type comparator_witness =
         Email_message_kernel__.Email.comparator_witness

type comparator_witness

val comparator : (t, comparator_witness) Base.Comparator.T.comparator