the number of districts for the region;
        defaults to 1 if value is less-than or equal to 0</dd>
<dt>Returns:</dt>
<dd>a set of districts matching the parameters, if feasible;
         an empty set if no feasible solution is found.</dd>
</dl>
</div>
</section>
</li>
<li>
<section class="detail" id="allDistrictsOfSpecificSize(metrocs.redistricting.Region,int)">
<h3>allDistrictsOfSpecificSize</h3>
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<div class="member-signature"><span class="modifiers">public static</span>&