Method getHelpColumns

Bcore/src/main/cpp/Dobby/tests/catch.hpp:6106–6113

  }

  auto getHelpColumns() const -> std::vector<HelpColumns> {
    std::vector<HelpColumns> cols;
    for (auto const &o : m_options) {
      auto childCols = o.getHelpColumns();
      cols.insert(cols.end(), childCols.begin(), childCols.end());
    }
    return cols;
  }

  void writeToStream(std::ostream &os) const {
    if (!m_exeName.name().empty()) {