public void addListener(KeyMatcher matcher, VehicleMessage.Listener listener) {
        Log.i(TAG, "Adding listener " + listener + " to " + matcher);
        mNotifier.register(matcher, listener);
    }
public void addListener ( KeyMatcher matcher , VehicleMessage . Listener listener ) { Log . i ( TAG , "Adding listener " + listener + " to " + matcher ) ; mNotifier . register ( matcher , listener ) ; }
Register to receive a callback when a message with key matching the given
KeyMatcher is received.

This function can be used to set up a wildcard listener, or one that
receives a wider range of responses than just a 1 to 1 match of keys.

@param matcher A KeyMatcher implement the desired filtering logic.
@param listener An listener instance to receive the callback.