Three attributes are included along with the MessagingPreferences object shown in Figure 1.
图1所示的MessagingPreferences对象包含三个属性。
Conditions: That an object has to fulfill to be included in the result.
条件：对象必须满足这些条件，才能被包含在结果中。
Conditions: That an object has to fulfill to be included in the result.
条件：对象必须满足这些条件，才能被包含在结果中。
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