Method open

tutorials/external/catch.hpp:13639–13648

    }

    void open() {
        if (!m_isOpen) {
            m_isOpen = true;
            *this << RowBreak();
            for (auto const& info : m_columnInfos)
                *this << info.name << ColumnBreak();
            *this << RowBreak();
            m_os << Catch::getLineOfChars<'-'>() << "\n";
        }
    }
    void close() {
        if (m_isOpen) {
            *this << RowBreak();