message: docs: comment on new unexpectedNames method
diff: @@ -470,6 +470,12 @@ public:
  return m_globalContainer.addStructDictionary(name, description);
  }
  + /*!
  + *****************************************************************************
  + * \brief Returns the global list of unexpected names, i.e., entries
  + * in the input file that were not added via an add* call
  + *****************************************************************************
  + */
  const std::unordered_set<std::string>& unexpectedNames() const
  {
  return m_unexpectedNames;
  