// In header: <boost/numeric/odeint/stepper/controlled_runge_kutta.hpp>
template<typename Value, typename Time>
class default_step_adjuster {
public:
  // types
  typedef Time  time_type;
  typedef Value value_type;
  // construct/copy/destruct
  default_step_adjuster(const time_type = static_cast< time_type >(0));
  // public member functions
  time_type decrease_step(time_type, const value_type, const int) const;
  time_type increase_step(time_type, value_type, const int) const;
  bool check_step_size_limit(const time_type);
  time_type get_max_dt();
};