namespace boost {
  namespace numeric {
    namespace odeint {
      template<typename Stepper, typename System, typename State,
               typename Time, typename Observer, typename StepOverflowChecker>
        size_t integrate_const(Stepper, System, State &, Time, Time, Time,
                               Observer, StepOverflowChecker);
      // Second version to solve the forwarding problem, can be called with Boost.Range as start_state. 
      template<typename Stepper, typename System, typename State,
               typename Time, typename Observer, typename StepOverflowChecker>
        size_t integrate_const(Stepper stepper, System system,
                               const State & start_state, Time start_time,
                               Time end_time, Time dt, Observer observer,
                               StepOverflowChecker checker);
      // integrate_const without step overflow checker 
      template<typename Stepper, typename System, typename State,
               typename Time, typename Observer>
        size_t integrate_const(Stepper stepper, System system,
                               State & start_state, Time start_time,
                               Time end_time, Time dt, Observer observer);
      // Second version to solve the forwarding problem, can be called with Boost.Range as start_state. 
      template<typename Stepper, typename System, typename State,
               typename Time, typename Observer>
        size_t integrate_const(Stepper stepper, System system,
                               const State & start_state, Time start_time,
                               Time end_time, Time dt, Observer observer);
      // integrate_const without observer calls 
      template<typename Stepper, typename System, typename State,
               typename Time>
        size_t integrate_const(Stepper stepper, System system,
                               State & start_state, Time start_time,
                               Time end_time, Time dt);
      // Second version to solve the forwarding problem, can be called with Boost.Range as start_state. 
      template<typename Stepper, typename System, typename State,
               typename Time>
        size_t integrate_const(Stepper stepper, System system,
                               const State & start_state, Time start_time,
                               Time end_time, Time dt);
    }
  }
}