toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (count != null) 'count': count!,
if (interval != null) 'interval': interval!,
if (maxValue != null) 'maxValue': maxValue!,
if (minValue != null) 'minValue': minValue!,
if (value != null) 'value': value!,
};