컬렉션 사용 시, equals(), hashCode() 오버라이딩 공식
https://incheol-jung.gitbook.io/docs/q-and-a/java/hashcode-equals hashCode()와 equals() - Incheol's TECH BLOG #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \\ develop(bool, InlineObjectHash, true, \\ product(intx, hashCode, 5, \\ incheol-jung.gitbook.io 위 사이트 참조
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