public static @NotNull List<? extends MergeableLineMarkerInfo<?>> getMergedMarkers(LineMarkerInfo<?> info) {
    if (info instanceof MyLineMarkerInfo myLineMarkerInfo) {
      return myLineMarkerInfo.getInfos();
    }
    return Collections.emptyList();
  }
public static @NotNull List<? extends MergeableLineMarkerInfo<?>> getMergedMarkers(LineMarkerInfo<?> info)