static @Nullable SeverityStatusItem runMerge(@NotNull SeverityStatusItem higher, @NotNull SeverityStatusItem lower) {
    return EP_NAME.getExtensionList().stream().map(e -> e.mergeItems(higher, lower)).filter(Objects::nonNull).findFirst().orElse(null);
  }
static @Nullable SeverityStatusItem runMerge(@NotNull SeverityStatusItem higher, @NotNull SeverityStatusItem lower)