bel.ensureEdgeLabelExist(&quot;ab&quot;, bVertexLabel,</b>
<b class="fc">&nbsp;                new HashMap&lt;&gt;() {{</b>
<b class="fc">&nbsp;                    put(&quot;name&quot;, PropertyDefinition.of(PropertyType.varChar(10)));</b>
&nbsp;                }});
<b class="fc">&nbsp;        this.sqlgGraph.tx().commit();</b>
<b class="fc">&nbsp;        Vertex a = this.sqlgGraph.addVertex(T.label, &quot;A&quot;, &quot;name&quot;, &quot;halo&quot;);</b>
<b class="fc">&nbsp;        this.sqlgGraph.addVertex(T