The use of the DataObject interface is described in more detail in Contact scenario.
DataObject接口的用法在联系人场景中进行了详细的描述。
Contact - This Interface represents a single contact on the Address Book.
Contact——这个接口表示AddressBook上的单个联系人。
Contact - This Interface represents a single contact on the Address Book.
Contact——这个接口表示AddressBook上的单个联系人。
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