Function operator+=

extern/json/json.hpp:22327–22331

@brief add an object to an array @sa https://json.nlohmann.me/api/basic_json/operator+=/

    /// @brief add an object to an array
    /// @sa https://json.nlohmann.me/api/basic_json/operator+=/
    reference operator+=(basic_json&& val)
    {
        push_back(std::move(val));
        return *this;
    }

    /// @brief add an object to an array
    /// @sa https://json.nlohmann.me/api/basic_json/push_back/