If the inverse clause is present the javafx interpreter will automatically perform updates insert or delete or replace depending on the kind of update and cardinalities of the attributes on the inverse attribute whenever the attribute s value is modified 如果反向子句出现在对象属性定义中，那么当此属性值被修改时javafx解释器将自动更新其反向属性根据更新的类型和属性的重数进行插入删除或者替换。
