You can search for identifiers within the package.
in-package search v0.2.0
type ('a, 'stream, 'b, 'c) t = 'a -> 'stream -> ('stream, 'b, 'c) result
type ks
val singleton : ('a, 'stream, 'b, 'c) t -> ks
val add : ('a, 'stream, 'b, 'c) t -> ks -> ks
val fold : (('a, 'stream, 'b, 'c) t -> ('stream, 'b, 'c) result -> ('stream, 'b, 'c) result) -> ks -> ('stream, 'b, 'c) result -> ('stream, 'b, 'c) result
val empty : ks
val length : ks -> int