Test Lwt ML code generation for non-trivial return types.
Test Lwt ML code generation for non-trivial return types.

whitequark/ocaml-ctypes,yallop/ocaml-ctypes,dsheets/ocaml-ctypes,ocamllabs/ocaml-ctypes,dsheets/ocaml-ctypes,whitequark/ocaml-ctypes,dsheets/ocaml-ctypes,yallop/ocaml-ctypes,whitequark/ocaml-ctypes,ocamllabs/ocaml-ctypes