span><span class="identifier">deriv_type</span>              <a name="boost.numeric.odeint.dense_output_r_idp20189216.deriv_type"></a><span class="identifier">deriv_type</span><span class="special">;</span>               
  <span class="keyword">typedef</span> <span class="identifier">stepper_type</span><span class="special">::</span><span class="identifier">wrapped_deriv_type</span>      <a name="boost.numeric.odeint.dense_output_r_idp20189216.wrapped_deriv_type"></a><span class="identifier">wrapped_deriv_