toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (key != null) 'key': key!,
if (longValueHistogramBucketingOption != null)
'longValueHistogramBucketingOption':
longValueHistogramBucketingOption!,
if (stringValueHistogram != null)
'stringValueHistogram': stringValueHistogram!,
};