public void NegativeLegacyRequiresIndirectThrow() {
   var c = new CodeUnderTest.LegacyPreconditions.C();
   c.IndirectThrow(-3);
 }
 public void PositiveLegacyRequiresDirectThrow() {
   var c = new CodeUnderTest.LegacyPreconditions.C();
   c.DirectThrow(3);
 }