public ComparisonSubject <T, U> Ltoet(bool result)
 {
     LTOET = substituteOrSame(LTOET);
     LTOET.Invoke(Arg.Any <T>(), Arg.Any <U>()).Returns(result);
     return(this);
 }
 public ComparisonSubject <T, U> Ltoet(T t, U u, bool result)
 {
     LTOET = substituteOrSame(LTOET);
     LTOET.Invoke(t, u).Returns(result);
     return(this);
 }