Method get

test/src/helper.cpp:447–453

            : m_on_get{std::move(on_get)}, m_on_set{std::move(on_set)} {}

    Maybe<Blob> get(const std::string& category, const Blob& key) override {
        auto ret = orig_impl->get(category, key);
        m_on_get(
                category, key.ptr, key.size, ret.valid() ? ret->ptr : 0,
                ret.valid() ? ret->size : 0);
        return ret;
    }

    void put(const std::string& category, const Blob& key, const Blob& value) override {
        m_on_set(category, key.ptr, key.size, value.ptr, value.size);