You can search for identifiers within the package.
in-package search v0.2.0
chartjs
Chartjs.Scriptable
type ('a, 'b) t
Scriptable options also accept a function which is called for each of the underlying data values and that takes the unique argument context representing contextual information.
context
val of_fun : ('a -> 'b) -> ('a, 'b) t Js_of_ocaml.Js.t