<table>
<tr><th align=left>Method</th><th align=left>Arguments</th><th align=left>Result</th><th
<tr><td

</tr>

</tr>

</tr>

</tr>

</tr>
of strings</td>
</tr>
<tr><td>map</td><td>string
</tr>

</tr>
<tr><td>serialize, (string --&gt; id)</td>
</tr>
<tr><td>deserialize,
</tr>
<tr><td>load,
</tr>
<tr><td>merge,
</tr>
</table>