toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (count != null) 'count': count!,
if (histogram != null) 'histogram': histogram!,
if (max != null) 'max': max!,
if (min != null) 'min': min!,
if (sum != null) 'sum': sum!,
if (sumOfSquares != null) 'sumOfSquares': sumOfSquares!,
};