Method IndexExtrator

src/openms_gui/source/VISUAL/SpectraTreeTab.cpp:71–75

  struct IndexExtrator
  {
    explicit IndexExtrator(const QTreeWidgetItem* item)
      : spectrum_index(item->data(ClmnPeak::SPEC_INDEX, Qt::DisplayRole).toInt()),
        res(item->data(ClmnChrom::TYPE, Qt::UserRole).toList()) // this works, even if the QVariant is invalid (then the list is empty)
    {
    }

    bool hasChromIndices() const
    {