optics
ãã¾ãç¥ããã¦ããªãé¢æ°åè¨èªã®ããããæ¦å¿µã¨ãã¦ãOpticsã¨ãããã®ãããã Opticsã¨ã¯ããªãã¸ã§ã¯ãæåè¨èªã§è¨ãã¨ããã®Setter/Getterãä¸ç¨®ã®é¢æ°ã¨ãã¦æããããã¤ãã®ä¾¿å©ãªç¹æ§ãä»ä¸ãããã®ã®ç·ç§°ã ããã®ä¾¿å©ãªç¹æ§ã«ãã£ã¦ãSetter/Gettâ¦