testNumbers method Null safety
override
Implementation
@override
Future<void> testNumbers() async {
await super.testNumbers();
await expect(Operations16.letterA.numericValue, 0xa);
await expect(Operations16.letterB.numericValue, 0xb);
await expect(Operations16.letterC.numericValue, 0xc);
await expect(Operations16.letterD.numericValue, 0xd);
await expect(Operations16.letterE.numericValue, 0xe);
await expect(Operations16.letterF.numericValue, 0xf);
}