heartRateSourceNullableFromJson function
        
HeartRateSource?
heartRateSourceNullableFromJson(
    
    
- Object? heartRateSource, [
- HeartRateSource? defaultValue
Implementation
enums.HeartRateSource? heartRateSourceNullableFromJson(
  Object? heartRateSource, [
  enums.HeartRateSource? defaultValue,
]) {
  if (heartRateSource == null) {
    return null;
  }
  return enums.HeartRateSource.values
          .firstWhereOrNull((e) => e.value == heartRateSource) ??
      defaultValue;
}