You can search for identifiers within the package.
in-package search v0.2.0
val let* : 'a option -> ('a -> 'b option) -> 'b option
Monadic let* allows to replace
let*
match e1 with | Some e2 -> Some (f e2) | None -> None
with
let* x = e1 in f x
val return : 'a -> 'b {t}1