What does the mremote variable in servicemanagerproxy refer to?

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First, the code marked in red Binder.allowBlocking(BinderInternal.getContextObject()), What's actually back is BinderProxy Object instances

 sServiceManager = ServiceManagerNative
                .asInterface(Binder.allowBlocking(BinderInternal.getContextObject()));

  static public IServiceManager asInterface(IBinder obj)
    {
        if (obj == null) {
            return null;
        }
        IServiceManager in =
            (IServiceManager)obj.queryLocalInterface(descriptor);
        if (in != null) {
            return in;
        }
        
        return new ServiceManagerProxy(obj);
    }

Then continue to ServiceManagerProxy, From below , Obviously .

class ServiceManagerProxy implements IServiceManager {
     public ServiceManagerProxy(IBinder remote) {
        mRemote = remote;
    }

    ...

    ...

}

}