@Override
    public @NotNull LinearGraphAnswer performAction(@NotNull ActionContext context) {
      CollapsedGraph.Modification modification = context.myCollapsedGraph.startModification();
      modification.removeAdditionalEdges();
      modification.resetNodesVisibility();
      return new LinearGraphAnswer(GraphChangesUtil.SOME_CHANGES, () -> modification.apply());
    }
@Override
    public @NotNull LinearGraphAnswer performAction(@NotNull ActionContext context)