Expands on the definition of the timestamp parameter, as per clju@ in

    /**

     * Called when an NMEA message is received.

     * @param message NMEA message

     * @param timestamp milliseconds since January 1, 1970.

     * @param timestamp Date and time of the location fix, as reported by the GNSS

     *                  chipset. The value is specified in milliseconds since 0:00

     *                  UTC 1 January 1970.

     */

    void onNmeaMessage(String message, long timestamp);

}