includeIfNull property
Specifies whether fields with null values should be included in the
serialized output.
If true, the field will be included in the serialized output even if its
value is null.
The default value, null, indicates that the behavior should be
acquired from the JsonSerializable.includeIfNull annotation on the
enclosing class.
If disallowNullValue is true, this value is treated as false to
ensure compatibility between toJson and fromJson.
If both includeIfNull and disallowNullValue are set to true on the
same field, an exception will be thrown during code generation.
Implementation
final bool? includeIfNull;