pub unsafe extern "C" fn enif_schedule_nif(
    arg1: *mut ErlNifEnv,
    arg2: *const c_char,
    arg3: c_int,
    arg4: Option<unsafe extern "C" fn(arg1: *mut ErlNifEnv, arg2: c_int, arg3: *const ERL_NIF_TERM) -> ERL_NIF_TERM>,
    arg5: c_int,
    arg6: *const ERL_NIF_TERM
) -> ERL_NIF_TERM