249     auto *err = wasmtime_structref_new(cx.capi(), pre.capi(), c_fields.data(),  in create()  local
251     if (err)  in create()
252       return Result<StructRef>(Error(err));  in create()
259     auto *err = wasmtime_structref_field(cx.capi(), &val, index, &out);  in field()  local
260     if (err)  in field()
261       return Result<Val>(Error(err));  in field()
268     auto *err =  in set_field()  local
270     if (err)  in set_field()
271       return Result<std::monostate>(Error(err));  in set_field()
393     auto *err =  in create()  local
395     if (err)  in create()
396       return Result<ArrayRef>(Error(err));  in create()
403     auto *err = wasmtime_arrayref_len(cx.capi(), &val, &out);  in len()  local
404     if (err)  in len()
405       return Result<uint32_t>(Error(err));  in len()
412     auto *err = wasmtime_arrayref_get(cx.capi(), &val, index, &out);  in get()  local
413     if (err)  in get()
414       return Result<Val>(Error(err));  in get()
421     auto *err = wasmtime_arrayref_set(cx.capi(), &val, index, &value.val);  in set()  local
422     if (err)  in set()
423       return Result<std::monostate>(Error(err));  in set()