           <p>
                      Expression
                    </p>
                  </th>
<th>
                    <p>
                      Attribute
                    </p>
                  </th>
</tr></thead>
<tbody><tr>
<td>
                    <p>
                      <code class="computeroutput"><span class="identifier">as</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;()[</span><span class="identifier">a</span><span class="special">]</span>