You can search for identifiers within the package.
in-package search v0.2.0
module type Monad = sig ... end
module type Monad_ext = sig ... end
module Monad_ext_make (M : Monad) : Monad_ext with type 'a t = 'a M.t
module Option : sig ... end
module type Or_error = sig ... end
module Or_error_make (M : sig ... end) : Or_error with type err = M.err and type 'a t = ('a, M.err) Stdlib.result