="special">:</span>
  <span class="comment">// types</span>
  <span class="keyword">typedef</span> <a class="link" href="explicit_stepper_base.html" title="Class template explicit_stepper_base">explicit_stepper_base</a><span class="special">&lt;</span> <a class="link" href="runge_kutta4_classic.html" title="Class template runge_kutta4_classic">runge_kutta4_classic</a><span class="special">&lt;</span> <span class="special">...</span> <span class="special">&gt;</span><span class="special">,</span><span class=