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java.lang.Object
	android.databinding.CallbackRegistry<android.databinding.Observable.OnPropertyChangedCallback, android.databinding.Observable, java.lang.Void>
		android.databinding.PropertyChangeRegistry

用于管理Observable回调的实用工具类。

Public constructors
`PropertyChangeRegistry()`

公共方法(Public methods)
`void`	`notifyChange(Observable observable, int propertyId)` 通知已注册的回调特定属性已更改。

From class android.databinding.CallbackRegistry

From class java.lang.Object

PropertyChangeRegistry ()

void notifyChange (Observable observable, 
                int propertyId)

通知已注册的回调特定属性已更改。

参数(Parameters)
`observable`	`Observable`: The Observable that has changed.
`propertyId`	`int`: The BR id of the property that has changed or BR._all if the entire Observable has changed.