31       let timestamp = REAL_TIMESTAMP_10.add(REAL_TIMESTAMP_20.getValueNs());  variable
32       expect(timestamp.getValueNs()).toBe(30n);
34       timestamp = ELAPSED_TIMESTAMP_10.add(ELAPSED_TIMESTAMP_20.getValueNs());
35       expect(timestamp.getValueNs()).toBe(30n);
39       let timestamp = REAL_TIMESTAMP_20.minus(REAL_TIMESTAMP_10.getValueNs());  variable
40       expect(timestamp.getValueNs()).toBe(10n);
42       timestamp = ELAPSED_TIMESTAMP_20.minus(ELAPSED_TIMESTAMP_10.getValueNs());
43       expect(timestamp.getValueNs()).toBe(10n);
47       let timestamp = TimestampConverterUtils.makeRealTimestamp(10n).div(2n);  variable
48       expect(timestamp.getValueNs()).toBe(5n);
50       timestamp = ELAPSED_TIMESTAMP_10.div(2n);
51       expect(timestamp.getValueNs()).toBe(5n);