public RxBleConnectionMock build() {
            if (this.rssi == -1) throw new IllegalStateException("Rssi is required. DeviceBuilder#rssi should be called.");
            return new RxBleConnectionMock(
                    rxBleDeviceServices,
                    rssi,
                    characteristicNotificationSources,
                    characteristicReadCallbacks,
                    characteristicWriteCallbacks,
                    descriptorReadCallbacks,
                    descriptorWriteCallbacks
            );
        }
Value used to disable notifications or indicatinos
mockrxandroidble/src/main/java/com/polidea/rxandroidble2/mockrxandroidble/RxBleConnectionMock.java