--- Singleton#instance
            Υ饹ͣΥ󥹥󥹤֤
            ǽ˸ƤФ줿ȤϤΥ󥹥󥹤롣

            Singletoninclude饹Τǡ
            ΤˤSingleton⥸塼Υ᥽åɤǤϤʤ

