You can search for identifiers within the package.
in-package search v0.2.0
type pixmap8 = (int, Bigarray.int8_unsigned_elt, Bigarray.c_layout) Bigarray.Array2.t
type pixmap16 = (int, Bigarray.int16_unsigned_elt, Bigarray.c_layout) Bigarray.Array2.t
type t =
| Pix8 of pixmap8
| Pix16 of pixmap16
val create8 : int -> int -> t
val create16 : int -> int -> t
val get : t -> int -> int -> int
val set : t -> int -> int -> int -> unit