qlgGraph.addVertex(T.label, &quot;B.B&quot;);</b>
<b class="fc">&nbsp;        a1.addEdge(&quot;ab&quot;, b1);</b>
&nbsp;
<b class="fc">&nbsp;        Vertex a2 = this.sqlgGraph.addVertex(T.label, &quot;A.A&quot;);</b>
&nbsp;
&nbsp;        try {
<b class="fc">&nbsp;            this.sqlgGraph.tx().checkMultiplicity(aVertexLabel, Direction.OUT, edgeLabel, bVertexLabel);</b>
<b class="nc">&nbsp;            Assert.fail(&quot;Expected multiplicity failure.&quot;);</b>
<b class="fc">&nbsp;        } catch (IllegalSt