w_operator        477 old_code/tumor_growth/tumor_code.h   const Tumor_Brusselator_operator w_operator {w_model, u_n, u_n};
w_operator        479 old_code/tumor_growth/tumor_code.h   LinearInverseOperatorType w_solver {w_operator, solverEps, solverEps};
w_operator        540 old_code/tumor_growth/tumor_code.h     w_operator.generate_rhs_old_surface(w_n, w_cg_rhs);
w_operator        548 old_code/tumor_growth/tumor_code.h     w_operator.generate_rhs_new_surface(tmp_fef);	// this can be done faster