You can search for identifiers within the package.
in-package search v0.2.0
leaves
Leaves.Progress
val make_ramp : 'a -> 'b -> int -> 'a array
val default_full_char : string
val default_empty_char : string
val default_color_ramp : int -> Spices.color array
val bar : width:int -> ?color_ramp:??? -> ?full_char:??? -> ?empty_char:??? -> Float.t -> string