toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (customFeatures != null) 'customFeatures': customFeatures!,
if (name != null) 'name': name!,
if (tableColumns != null) 'tableColumns': tableColumns!,
if (type != null) 'type': type!,
if (unique != null) 'unique': unique!,
};