You can search for identifiers within the package.
in-package search v0.2.0
type 'a result =
| Success of 'a
| Failure of string
val return : 'a -> 'a result
val default : 'a -> 'a result -> 'a
val (>>=) : 'a result -> ('a -> 'b result) -> 'b result
val (<$>) : ('a -> 'b) -> 'a result -> 'b result