You can search for identifiers within the package.
in-package search v0.2.0
type t = {
start : int;
mutable buf : bytes;
}
val create : int -> t
val mark : t -> int -> unit
val mark_range : t -> int -> int -> unit
val find_free_bit : int -> int -> int
val (.%[]) : t -> int -> bool
val first_free : t -> int -> int