public static @NotNull NavigationGutterIconBuilder<PsiElement> create(@NotNull Icon icon, @NlsContexts.Separator String navigationGroup) {
    return create(icon, DEFAULT_PSI_CONVERTOR, element -> List.of(new GotoRelatedItem(element, navigationGroup)));
  }
public static @NotNull NavigationGutterIconBuilder<PsiElement> create(@NotNull Icon icon, @NlsContexts.Separator String navigationGroup)