message: Arnaud's comments on PR
diff: @@ -121,9 +121,7 @@ namespace RINGMesh {
  */
  StratigraphicUnit( const std::string name, const RockFeature& rock );
  - virtual ~StratigraphicUnit()
  - {
  - }
  + virtual ~StratigraphicUnit() = default;
  virtual const std::string& get_name() const
  {
  @@ -186,6 +184,8 @@ namespace RINGMesh {
  double min_thick,
  double max_thick );
  + virtual ~UnsubdividedStratigraphicUnit() = default;
  +
  virtual bool is_conformable_base() const final
  {
  return ( relation_base_ == RELATION::CONFORMABLE );
  @@ -247,6 +247,8 @@ namespace RINGMesh {
  {
  }
  + virtual ~SubdividedStratigraphicUnit() = default;
  +
  virtual bool is_conformable_base() const final
  {
  return ( units_.back()->is_conformable_base() );
  @@ -334,9 +336,7 @@ namespace RINGMesh {
  {
  }
  - virtual ~StratigraphicColumn()
  - {
  - }
  + ~StratigraphicColumn() = default;
  /*!
  * \name Stratigraphic Column edition
  