code: def modelnumericfunctions(self):
          
          lines = Lines()
          lines.extend(self.solve)
          lines.extend(self.calculate_single_terms)
          lines.extend(self.calculate_full_terms)
          lines.extend(self.get_point_states)
          lines.extend(self.set_point_states)
          lines.extend(self.set_result_states)
          lines.extend(self.get_sum_fluxes)
          lines.extend(self.set_point_fluxes)
          lines.extend(self.set_result_fluxes)
          lines.extend(self.integrate_fluxes)
          lines.extend(self.reset_sum_fluxes)
          lines.extend(self.addup_fluxes)
          lines.extend(self.calculate_error)
          lines.extend(self.extrapolate_error)
          return lines
docs: Numerical functions of the model class.