copyWith method
Implementation
SprintCreateBean copyWith(
    {String? name,
    String? startDate,
    String? endDate,
    int? originBoardId,
    String? goal}) {
  return SprintCreateBean(
    name: name ?? this.name,
    startDate: startDate ?? this.startDate,
    endDate: endDate ?? this.endDate,
    originBoardId: originBoardId ?? this.originBoardId,
    goal: goal ?? this.goal,
  );
}