ss="special">::</span><span class="identifier">ref</span><span class="special">(</span><span class="identifier">c</span><span class="special">)</span> <span class="special">=</span> <span class="special">(</span><span class="identifier">_1</span> <span class="special">==</span> <span class="number">4</span><span class="special">)]));</span>
</pre>
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