@Override
                    public SingleSource<? extends BluetoothGattCharacteristic> apply(RxBleDeviceServices rxBleDeviceServices)
                            throws Exception {
                        return rxBleDeviceServices.getCharacteristic(characteristicUuid);
                    }
Value used to disable notifications or indicatinos
mockrxandroidble/src/main/java/com/polidea/rxandroidble2/mockrxandroidble/RxBleConnectionMock.java