You can search for identifiers within the package.
in-package search v0.2.0
lsp.stdune
Stdune.Applicative
module Id : Applicative_intf.S1 with type 'a t = 'a
module Make (A : Applicative_intf.S1_base) : Applicative_intf.S1 with type 'a t := 'a A.t