You can search for identifiers within the package.
in-package search v0.2.0
val pair : 'a size_of -> 'b size_of -> ('a * 'b) size_of
val triple : 'a size_of -> 'b size_of -> 'c size_of -> ('a * 'b * 'c) size_of
val list : 'a size_of -> 'a list size_of
val option : 'a size_of -> 'a option size_of