docs: public void hasLastElement(@NullableDecl Object element) {
      if (actualAsNavigableSet().isEmpty()) {
        failWithActual("expected to have last element", element);
        return;
      }
  
      if (!Objects.equal(actualAsNavigableSet().last(), element)) {
        if (actualAsNavigableSet().contains(element)) {
          failWithoutActual(
              simpleFact(
                  lenientFormat(
                      "Not true that %s has last element <%s>. "
                          + "It does contain this element, but the last element is <%s>",
                      actualAsString(), element, actualAsNavigableSet().last())));
          return;
        }
        failWithoutActual(
            simpleFact(
                lenientFormat(
                    "Not true that %s has last element <%s>. "
                        + "It does not contain this element, and the last element is <%s>",
                    actualAsString(), element, actualAsNavigableSet().last())));
      }
    }