UserModel.fromJson constructor
Implementation
UserModel.fromJson(Map<String, Object?> data) {
age = data.readIntOr('age', 0);
name = data.readStringOr('name', '');
role = data.readEnumOr('role', Role.values, Role.unknown);
isStudent = data.readBoolOr('isStudent', false);
grades = data.readListOrEmpty<int>('grades');
}