toJson method
Implementation
@override
Map<String, Object?> toJson() => {
if (requiredValue != null) "required": encodeValue(requiredValue),
if (defaultValue != null) "default": encodeValue(defaultValue),
if (about != null) "about": encodeValue(about),
if (items != null) "items": encodeValue(items),
"name": encodeValue(name),
"type": encodeValue(type),
};