You can search for identifiers within the package.
in-package search v0.2.0
type t
type str = str
type index
val group : t -> index -> str option
val group_pos : t -> index -> (int * int) option
val fold_left : t -> init:'a -> f:('a -> str S.substr -> 'a) -> 'a
val all : t -> str list
val alli : t -> (index * str) list
val full_match : t -> str
val full_match_pos : t -> int * int