ot;\&quot;&quot; + id.toString() + &quot;\&quot;&quot;;</b>
&nbsp;    }
&nbsp;
&nbsp;    private void cleanEmpty() {
<b class="nc">&nbsp;        empty.tx().commit();</b>
<b class="nc">&nbsp;        classic.tx().commit();</b>
<b class="nc">&nbsp;        modern.tx().commit();</b>
<b class="nc">&nbsp;        sink.tx().commit();</b>
<b class="nc">&nbsp;        grateful.tx().commit();</b>
<b class="nc">&nbsp;        final GraphTraversalSource g = empty.traversal();</b>
<b class="nc">&nbsp;        g.V().drop().it