You can search for identifiers within the package.
in-package search v0.2.0
lwt.unix
Versioned.libev_2
Since Lwt 3.0.0, this is just an alias for Lwt_engine.libev.
Lwt_engine.libev
Use Lwt_engine.libev.
inherit t
val loop : ev_loop
method loop : ev_loop