Type Alias ocaml_interop::OCamlFn4

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pub type OCamlFn4<'a, A, B, C, D, Ret> = unsafe fn(_: &'a mut OCamlRuntime, _: OCamlRef<'_, A>, _: OCamlRef<'_, B>, _: OCamlRef<'_, C>, _: OCamlRef<'_, D>) -> OCaml<'a, Ret>;

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OCaml function that accepts four arguments.