ember functions</a></span>
  <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="output_test_stream.html#idp41352320-bb"><span class="identifier">length</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">virtual</span> <span class="keyword">void</span> <a class="link" href="output_test_stream.html#idp41353456-bb"><span class="identifier">sync</span></a><span cl