You can search for identifiers within the package.
in-package search v0.2.0
codex.domains
Boolean.Boolean_Backward
val (||) : 'a -> 'b -> 'c -> 'd
val (&&) : 'a -> 'b -> 'c -> 'd
val not : 'a -> 'b -> 'c
val assume : 'a -> 'b -> 'c -> 'd