Support 'opaque' in OCAMLPARAM
Support 'opaque' in OCAMLPARAM

msprotz/ocaml,yunxing/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml,eliberis/ocaml,yunxing/ocaml,eliberis/ocaml,msprotz/ocaml,msprotz/ocaml,eliberis/ocaml,yunxing/ocaml,msprotz/ocaml,msprotz/ocaml,eliberis/ocaml,gerdstolpmann/ocaml,yunxing/ocaml,gerdstolpmann/ocaml,yunxing/ocaml,gerdstolpmann/ocaml,eliberis/ocaml