private DottedFilterEdgesGenerator(
     @NotNull CollapsedGraph collapsedGraph,
     @NotNull CollapsedGraph.Modification modification,
     int upIndex,
     int downIndex) {
   myCollapsedGraph = collapsedGraph;
   myModification = modification;
   myLiteDelegateGraph = LinearGraphUtils.asLiteLinearGraph(collapsedGraph.getDelegatedGraph());
   myUpIndex = upIndex;
   myDownIndex = downIndex;
   myNumbers = new ShiftNumber(upIndex, downIndex);
 }