You can search for identifiers within the package.
in-package search v0.2.0
strings.ml
1 2 3 4 5 let contains_substring substr str = try let _ = Str.search_forward (Str.regexp substr) str 0 in true with Not_found -> false
1 2 3 4 5
let contains_substring substr str = try let _ = Str.search_forward (Str.regexp substr) str 0 in true with Not_found -> false