fc">&nbsp;        this.sqlgGraph.tx().commit();</b>
&nbsp;
<b class="fc">&nbsp;        Map&lt;String, PropertyDefinition&gt; properties = new HashMap&lt;&gt;();</b>
<b class="fc">&nbsp;        properties.put(&quot;a&quot;, PropertyDefinition.of(PropertyType.STRING, Multiplicity.of(0, 1)));</b>
&nbsp;        try {
<b class="fc">&nbsp;            publicSchema.ensureVertexLabelExist(&quot;A&quot;, properties);</b>
<b class="fc">&nbsp;        } catch (IllegalStateException e) {</b>
<b class="pc">&nbsp;         