You can search for identifiers within the package.
in-package search v0.2.0
type nonrec 'a t = 'a list t
val rev_union : 'a t -> 'a t -> 'a t
val cons : 'a t -> key -> 'a -> 'a t
val find : 'a t -> key -> 'a list
val add_all : 'a t -> key -> 'a list -> 'a t