PropertyDefinition;
&nbsp;import org.umlg.sqlg.structure.PropertyType;
&nbsp;import org.umlg.sqlg.structure.topology.Schema;
&nbsp;import org.umlg.sqlg.test.BaseTest;
&nbsp;
&nbsp;import java.util.HashMap;
&nbsp;
<b class="nc">&nbsp;public class TestTopologyRequiredProperty  extends BaseTest {</b>
&nbsp;
&nbsp;    @Test
&nbsp;    public void testRequiredProperty() {
<b class="nc">&nbsp;        Schema publicSchema = this.sqlgGraph.getTopology().getPublicSchema();</b>
<b class="nc">&nbsp;        publicSchema.