/**
  *  @return same as GetActiveTension() for algebraic models (uses which stretch and
  *  and stretch rate has been passed in).
  */
 double GetNextActiveTension()
 {
     return GetActiveTension();
 }
double Kerchoffs2003ContractionModel::GetNextActiveTension()
{
    return GetActiveTension(mTemporaryStateVariables[0]);
}