     throw new RuntimeException(e);</b>
&nbsp;        }
&nbsp;    }
&nbsp;
&nbsp;    @Test
&nbsp;    public void testChangingMultiplicityOnVertex() {
<b class="fc">&nbsp;        Schema publicSchema = this.sqlgGraph.getTopology().getPublicSchema();</b>
<b class="fc">&nbsp;        publicSchema.ensureVertexLabelExist(&quot;A&quot;, new HashMap&lt;&gt;() {{</b>
<b class="fc">&nbsp;            put(&quot;a&quot;, PropertyDefinition.of(PropertyType.STRING, Multiplicity.of(1, 1)));</b>
&nbsp;        }});
<b class="