toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (categoricalFeatures != null)
'categoricalFeatures': categoricalFeatures!
.map((key, item) => core.MapEntry(key, item.toJson())),
if (numericalFeatures != null)
'numericalFeatures': numericalFeatures!
.map((key, item) => core.MapEntry(key, item.toJson())),
};