You can search for identifiers within the package.
in-package search v0.2.0
val at_domain : Colombe__Domain.t Angstrom.t
val a_d_l : Colombe__Domain.t list Angstrom.t
val is_atext : char -> bool
val is_qtextSMTP : char -> bool
val atom : string Angstrom.t
val dot_string : [> `Dot_string of string list ] Angstrom.t
val quoted_pairSMTP : string Angstrom.t
val qcontentSMTP : string Angstrom.t
val quoted_string : [> `String of string ] Angstrom.t
val local_part : [> `Dot_string of string list | `String of string ] Angstrom.t
val mailbox : ([> `Dot_string of string list | `String of string ] * Colombe__Domain.t) Angstrom.t
val path : t Angstrom.t