public BluetoothGattCharacteristic getBluetoothGattCharacteristic() {
        return bluetoothGattCharacteristic;
    }
Used when a call to writing to Client Characteristic Configuration Descriptor fails due to
{@link BluetoothGatt#writeDescriptor(BluetoothGattDescriptor)} returns `false` or
{@link android.bluetooth.BluetoothGattCallback#onDescriptorWrite(BluetoothGatt, BluetoothGattDescriptor, int)} is called with status
other than {@link BluetoothGatt#GATT_SUCCESS}.
rxandroidble/src/main/java/com/polidea/rxandroidble2/exceptions/BleCannotSetCharacteristicNotificationException.java