documentation for packages

Vlad Kozin <[email protected]>
Newsgroups gmane.comp.lang.ocaml.beginners
Message-ID <[email protected]>
Hi all. A really silly question. Where do I find docs for ocaml packages? 
ocaml.org says specific packages should link to their respective docs, but it doesn't appear so. For example Core: https://opam.ocaml.org/pkg/core/core.109.60.00/ has nothing

More generally is there a way for me to search the contents of packages and libraries for declarations? Say, find all modules that define toList procedure. 

Thanks
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Vlad Kozin <[email protected]>
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