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<link title="Service" rel="Chapter" href="Service.html"><title>Service</title>
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<code class="code"><span class="keyword">sig</span><br>
&nbsp;&nbsp;<span class="keyword">type</span>&nbsp;<span class="keywordsign">'</span>a&nbsp;t<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;create&nbsp;:&nbsp;unit&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="keywordsign">'</span>a&nbsp;<span class="constructor">Se