outputs.resize(2, {nullptr, -1});

    // Create loop: while (input1 < input2) input1 += input2 + 1
    TF_Operation* less_than = LessThan(
        params->cond_inputs[0], params->cond_inputs[1], params->cond_graph, s_);
    ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);
    params->cond_output = {less_than, 0};

    TF_Operation* add1 = Add(params->body_inputs[0], params->body_inputs[1],

    assertEquals(empty, Maps.subMap(map, Range.lessThan(0)));
    assertEquals(ImmutableSortedMap.of(2, 0), Maps.subMap(map, Range.lessThan(4)));
    assertEquals(ImmutableSortedMap.of(2, 0, 4, 0, 6, 0), Maps.subMap(map, Range.lessThan(7)));
    assertEquals(map, Maps.subMap(map, Range.lessThan(20)));

    assertEquals(empty, Maps.subMap(map, Range.atMost(0)));