toJson method
Implementation
Map<String, Object?> toJson() => {
'name': name.name,
if (length != null) 'length': length,
if (precision != null) 'precision': precision,
if (scale != null) 'scale': scale,
if (customName != null) 'customName': customName,
if (timezoneAware) 'timezoneAware': timezoneAware,
};