Method find

lesson6-Segmentation/json.hpp:16518–16528

    }

    iterator find(const Key& key)
    {
        for (auto it = this->begin(); it != this->end(); ++it)
        {
            if (it->first == key)
            {
                return it;
            }
        }
        return Container::end();
    }

    const_iterator find(const Key& key) const
    {