    <p>
                  <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">available_read_bytes</span><span class="special">()</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span></code>
                </p>
              </td>
<td>
                <p>
            