Method SetProperty

lib/mdflib/mdflib/src/ixmlnode.h:137–140

   */
  template <typename T>
  void SetProperty(const std::string &key, const T &value) {
    auto &node = AddUniqueNode(key);
    node.Value(value);
  }

  /** \typedef ChildList
   * \brief List of pointer to child nodes.