You can search for identifiers within the package.
in-package search v0.2.0
type buffer = [
| `accum
| `color
| `depth
| `stencil
]
val clear : buffer list -> unit
val accum : ?alpha:float -> Gl.rgb -> unit
val color : ?alpha:float -> Gl.rgb -> unit
val depth : Gl.clampf -> unit
val index : float -> unit
val stencil : int -> unit