void Sequence::setSlice(int start, int stop, const Sequence &seq)
 {
     PySequence_SetSlice(mPtr, start, stop, seq.borrowReference());
     PW_PyExcept_Check("Sequence::setSlice");
 }
 Sequence Sequence::operator+(const Sequence &rhs) const
 {
     return Sequence(NewReference(PySequence_Concat(mPtr, rhs.borrowReference())));
 }