toJson method
Implementation
@override
Map<String, Object?> toJson() => super.toJson()
..addAll({
if (addJot != false) 'addJot': addJot,
'body': body.map((e) => e.toJson()),
if (arrayStretch != 1.0) 'arrayStretch': arrayStretch,
'hlines': hlines.map((e) => e.toString()),
'rowSpacings': rowSpacings.map((e) => e.toString())
});