toJson method
Implementation
@override
Map<String, Object?> toJson() => super.toJson()
..addAll({
'operator': unicodeLiteral(operator),
if (upperLimit != null) 'upperLimit': upperLimit!.toJson(),
if (lowerLimit != null) 'lowerLimit': lowerLimit!.toJson(),
'naryand': naryand.toJson(),
if (limits != null) 'limits': limits,
if (allowLargeOp != true) 'allowLargeOp': allowLargeOp,
});