You can search for identifiers within the package.
in-package search v0.2.0
context.ml
1 2 3 4 5 open! Core type t external init : unit -> (t, Krb_error0.t) Result.t = "caml_krb5_init_context_global"
1 2 3 4 5
open! Core type t external init : unit -> (t, Krb_error0.t) Result.t = "caml_krb5_init_context_global"