`module Js = Migrate_parsetree.OCaml_405`
`module Ocaml = Migrate_parsetree.Versions.OCaml_current`
`module Select_ast : functor (Ocaml : Migrate_parsetree.Versions.OCaml_version) -> sig ... end`
`module Selected_ast : sig ... end`
`module Parsetree = Selected_ast.Ast.Parsetree`
`module Asttypes = Selected_ast.Ast.Asttypes`
`module Location : sig ... end`
`module Clflags = Ocaml_common.Clflags`
`module Longident = Ocaml_common.Longident`
`module Misc = Ocaml_common.Misc`
`module Warnings = Ocaml_common.Warnings`