@Reason
    public int getReason() {
        return reason;
    }
Should return one of {@link #CANNOT_SET_LOCAL_NOTIFICATION}, {@link #CANNOT_FIND_CLIENT_CHARACTERISTIC_CONFIG_DESCRIPTOR},
{@link #CANNOT_WRITE_CLIENT_CHARACTERISTIC_CONFIG_DESCRIPTOR}

@return the reason
rxandroidble/src/main/java/com/polidea/rxandroidble2/exceptions/BleCannotSetCharacteristicNotificationException.java