Function parent_pointer

include/behaviortree_cpp/contrib/json.hpp:13950–13960

@brief returns the parent of this JSON pointer @sa https://json.nlohmann.me/api/json_pointer/parent_pointer/

    /// @brief returns the parent of this JSON pointer
    /// @sa https://json.nlohmann.me/api/json_pointer/parent_pointer/
    json_pointer parent_pointer() const
    {
        if (empty())
        {
            return *this;
        }

        json_pointer res = *this;
        res.pop_back();
        return res;
    }

    /// @brief remove last reference token
    /// @sa https://json.nlohmann.me/api/json_pointer/pop_back/