toObject method
Implementation
@override
dynamic toObject() => {
_Keys.frequency: frequency,
_Keys.avgHR: avgHR,
_Keys.classification: classification,
_Keys.lead: lead,
_Keys.originalSource: originalSource?.toList(),
_Keys.source: source,
_Keys.timeStart: timeStart,
_Keys.timeEnd: timeEnd,
_Keys.timezoneOffset: timezoneOffset,
_Keys.unit: unit,
_Keys.samples: samples?.toList(),
};