6">&#9670;&nbsp;</a></span>NewOptionalIntervalVar&lt; S, D, E &gt;()</h2>

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          <td class="memname"><a class="el" href="classGoogle_1_1OrTools_1_1Sat_1_1IntervalVar.html">IntervalVar</a> NewOptionalIntervalVar&lt; S, D, E &gt; </td>
          <td>(</td>
          <td class="paramtype">S&#160;</td>
          <td class="paramname"><em>start</em>, </td>
       