function HSMDateTimeUnixEpoch(properties) {
                            if (properties)
                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                    if (properties[keys[i]] != null)
                                        this[keys[i]] = properties[keys[i]];
                        }
Constructs a new HSMDateTimeUnixEpoch.
@memberof proto.Message.HighlyStructuredMessage.HSMLocalizableParameter.HSMDateTime
@classdesc Represents a HSMDateTimeUnixEpoch.
@implements IHSMDateTimeUnixEpoch
@constructor
@param {proto.Message.HighlyStructuredMessage.HSMLocalizableParameter.HSMDateTime.IHSMDateTimeUnixEpoch=} [properties] Properties to set