virtual void v_DoBoundary(const Array< OneD, const Array< OneD, NekDouble > > &inarray, Array< OneD, Array< OneD, NekDouble > > &A_0, Array< OneD, Array< OneD, NekDouble > > &beta, Array< OneD, Array< OneD, NekDouble > > &alpha, const NekDouble time, int omega, int offset, int n)