You can search for identifiers within the package.
in-package search v0.2.0
val let* : ('a, 'b) Stdlib.result -> ('a -> ('c, 'b) Stdlib.result) -> ('c, 'b) Stdlib.result
val let+ : ('a, 'b) Stdlib.result -> ('a -> 'c) -> ('c, 'b) Stdlib.result