@Override
            public LongWriteOperationBuilder setCharacteristicUuid(@NonNull final UUID uuid) {
                bluetoothGattCharacteristicObservable = discoverServices().flatMap(
                        new Function<RxBleDeviceServices, SingleSource<BluetoothGattCharacteristic>>() {
                            @Override
                            public SingleSource<BluetoothGattCharacteristic> apply(RxBleDeviceServices rxBleDeviceServices) {
                                return rxBleDeviceServices.getCharacteristic(uuid);
                            }
                        }
                );
                return this;
            }
Value used to disable notifications or indicatinos
mockrxandroidble/src/main/java/com/polidea/rxandroidble2/mockrxandroidble/RxBleConnectionMock.java