public String getDeviceSerialNumber() {
        return deviceSerialNumber;
    }
Gets the Multi-Factor Authentication device serial number.

@return The Multi-Factor Authentication device serial number.

@see MultiFactorAuthentication#setDeviceSerialNumber(String)
@see MultiFactorAuthentication#withDeviceSerialNumber(String)
aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/model/MultiFactorAuthentication.java