@Deprecated
        public Builder notificationSource(@NonNull UUID characteristicUUID, @NonNull Observable<byte[]> sourceObservable) {
            connectionMockBuilder.notificationSource(characteristicUUID, sourceObservable);
            return this;
        }
Set an {@link Observable} that will be used to fire characteristic change notifications. It will be subscribed to after
a call to {@link com.polidea.rxandroidble2.RxBleConnection#setupNotification(UUID)}. Calling this method is not required.

@param characteristicUUID UUID of the characteristic that will be observed for notifications
@param sourceObservable   Observable that will be subscribed to in order to receive characteristic change notifications
@deprecated Use {@link #connectionMock} and
            {@link RxBleConnectionMock.Builder#notificationSource(UUID characteristicUUID, Observable sourceObservable)}
mockrxandroidble/src/main/java/com/polidea/rxandroidble2/mockrxandroidble/RxBleDeviceMock.java