You can search for identifiers within the package.
in-package search v0.2.0
val set : 'a t -> S.t fold -> 'a -> unit
val find_def : default:(creator -> 'a) -> 'a t -> S.t fold -> 'a
val memo : default:(creator -> 'a) -> 'a t -> S.t fold -> 'a
find and add default if not present