Method hash

python/mod_cvcuda/include/nvcv/python/Cache.hpp:34–41

    virtual ~IKey() = default;

    size_t hash() const
    {
        size_t h = doGetHash();

        // Make hash dependent on concrete object type
        h ^= typeid(*this).hash_code() << 1;
        return h;
    }

    bool operator==(const IKey &that) const
    {