Method FakeUint64Map

eval/public/builtin_func_test.cc:1208–1215

class FakeUint64Map : public FakeMap<uint64_t> {
 public:
  explicit FakeUint64Map(const std::map<uint64_t, CelValue>& data)
      : FakeMap(data, CelValue::CreateUint64,
                [](CelValue v) -> absl::optional<uint64_t> {
                  if (!v.IsUint64()) {
                    return absl::nullopt;
                  }
                  return v.Uint64OrDie();
                }) {}
};

class FakeStringMap : public FakeMap<CelValue::StringHolder> {