You can search for identifiers within the package.
in-package search v0.2.0
type ('s, 'a) t = ('s, 'a option) Lens.t
val lens : ('a, 'b) Lens.t -> ('a0, 'b0) t
val prism : ('a, 'b) Prism.t -> ('a0, 'b0) t
val (>&) : ('a, 'b) Lens.t -> ('b0, 'c) Prism.t -> ('a0, 'c0) t
val (>$) : ('a, 'b) Prism.t -> ('b0, 'c) Lens.t -> ('a0, 'c0) t
val (>>) : ('a, 'b) t -> ('b0, 'c) t -> ('a0, 'c0) t