    a1.addEdge(&quot;knows&quot;, b1);</b>
<b class="fc">&nbsp;        b1.addEdge(&quot;knownBy&quot;, a2);</b>
&nbsp;
&nbsp;        //and another
<b class="fc">&nbsp;        Vertex a3 = this.sqlgGraph.addVertex(T.label, &quot;A&quot;, &quot;name&quot;, &quot;a3&quot;);</b>
<b class="fc">&nbsp;        Vertex a4 = this.sqlgGraph.addVertex(T.label, &quot;A&quot;, &quot;name&quot;, &quot;a4&quot;);</b>
<b class="fc">&nbsp;        Vertex b2 = this.sqlgGraph.addVertex(T.label, &quot;B&quot;, &quot;name&quot;, &q