Modref.SetModule reference sets.
val pp : ?sep:unit B0_std.Fmt.t -> elt B0_std.Fmt.t -> t B0_std.Fmt.tpp ~sep pp_elt ppf rs formats the elements of rs on ppf. Each element is formatted with pp_elt and elements are separated by ~sep (defaults to B0_std.Fmt.cut). If the set is empty leaves ppf untouched.
val dump : t B0_std.Fmt.tdump ppf ss prints an unspecified representation of ss on ppf.