output: #fixed code
                                  @Test
      public void testIdNotLoadedAsProperty() throws Exception {
          Vertex v = this.sqlgGraph.addVertex(T.label, "Person", "name", "a");
          this.sqlgGraph.tx().commit();
          this.sqlgGraph.close();
          try (SqlgGraph sqlgGraph1 = SqlgGraph.open(configuration)) {
              Vertex vv = sqlgGraph1.traversal().V(v.id()).next();
              Assert.assertFalse(vv.property("ID").isPresent());
              Map<String, PropertyType> propertyTypeMap = sqlgGraph1.getTopology().getAllTables().get(SchemaTable.of(
                      sqlgGraph1.getSqlDialect().getPublicSchema(), "V_Person").toString());
              Assert.assertFalse(propertyTypeMap.containsKey("ID"));
              sqlgGraph1.tx().rollback();
          }
      }
input: #vulnerable code 
                                  @Test
      public void testIdNotLoadedAsProperty() throws Exception {
          Vertex v = this.sqlgGraph.addVertex(T.label, "Person", "name", "a");
          this.sqlgGraph.tx().commit();
          this.sqlgGraph.close();
          try (SqlgGraph sqlgGraph1 = SqlgGraph.open(configuration)) {
              Vertex vv = sqlgGraph1.traversal().V(v.id()).next();
              assertFalse(vv.property("ID").isPresent());
              Map<String, PropertyType> propertyTypeMap = sqlgGraph1.getTopology().getAllTables().get(SchemaTable.of(
                      sqlgGraph1.getSqlDialect().getPublicSchema(), "V_Person").toString());
              assertFalse(propertyTypeMap.containsKey("ID"));
              sqlgGraph1.tx().rollback();
          }
      } 
                              #location 9 
                              #vulnerability type NULL_DEREFERENCE