toJson method
Returns a serialized JSON structure of the model which also includes fields used by the database.
Implementation
@override
Map<String, dynamic> toJson() {
return {
'columnName': columnName,
'addNullable': addNullable,
'removeNullable': removeNullable,
'changeDefault': changeDefault,
if (newDefault != null) 'newDefault': newDefault,
};
}