nbsp;            return modern.traversal();</b>
<b class="nc">&nbsp;        else if (graphData == GraphData.SINK)</b>
<b class="nc">&nbsp;            return sink.traversal();</b>
<b class="nc">&nbsp;        else if (graphData == GraphData.GRATEFUL)</b>
<b class="nc">&nbsp;            return grateful.traversal();</b>
&nbsp;        else
<b class="nc">&nbsp;            throw new UnsupportedOperationException(&quot;GraphData not supported: &quot; + graphData.name());</b>
&nbsp;    }
&nbsp;
&nbsp;    @Override
&