### Question:
TableMeta { public boolean hasColumn(String columnName) { return propertyDescriptorMap.containsKey(columnName); } private  TableMeta(String name, List<PropertyDescriptor> primaryKeyMetas,
			Map<String, PropertyDescriptor> propertyDescriptorMap,
			List<BeforeInsertHandler> beforeInsertTriggers,
			List<BeforeUpdateHandler> beforeUpdateTriggers,
			Map<String, List<Inflater>> inflaters, Map<String, List<Deflater>> deflaters,
			RowBuilder rowBuilder); String getName(); List<PropertyDescriptor> getPrimaryKeys(); boolean hasColumn(String columnName); Optional<String> getColumnName(PropertyDescriptor beanPropertyDescriptor);  }### Answer:
@Test public void testHasColumn() { TableMeta<?> tableMeta = orm .getTableMeta(Member.class); assertTrue(tableMeta.hasColumn("id")); assertTrue(tableMeta.hasColumn("q_no")); assertTrue(tableMeta.hasColumn("url")); assertFalse(tableMeta.hasColumn("unknown")); }