
<td>.</td>
</tr>
<tr>
<td>modify</td>
<td>X</td>
<td>X</td>
<td>.</td>
</tr>
<tr>
<td>report</td>
<td>X</td>
<td>.</td>
<td>X</td>
</tr>
</tbody>
</table>
<p>This may seem rather pointless for our toy example,
but it proves its worth when we are looking at something like
the virtual machine we will build in <a class="x-ref" href="../virtual-machine/">Chapter 19</a>,
which has a more complex method definition table:</p>
<table>
<thead>
<tr>
<th>method</th>
<th>Base</th>
<th>Interactive</th>
<th>Test</th>
<t