You can search for identifiers within the package.
in-package search v0.2.0
module type Intf = sig ... end
type t
val is_error : t -> bool
val is_priority : t -> bool
val is_read_closed : t -> bool
val is_readable : t -> bool
val is_writable : t -> bool
val is_write_closed : t -> bool
val make : (module Intf with type t = 'state) -> 'state -> t
val token : t -> Token.t