t">ID</code>. </p>
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<pre class="literallayout"><span class="keyword">typename</span> Base</pre>
<p>The base of this class. Specializations of <code class="computeroutput"><a class="link" href="concept_interface.html" title="Struct template concept_interface">concept_interface</a></code> must inherit publicly from this type. </p>
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<pre class="literallayout"><span class="keyword">typename</span> ID</pre>
<p>The placeholder representing this type. </p>
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