https://thinking-face.tistory.com/entry/Inflate%EC%97%90%EC%84%9C-%EB%A7%A4%EA%B0%9C%EB%B3%80%EC%88%98-attachToParent%EC%9D%98-%EC%9D%98%EB%AF%B8
http://cris.joongbu.ac.kr/course/java/api/java/lang/IllegalStateException.html
https://velog.io/@ejjjang0414/%EC%95%88%EB%93%9C%EB%A1%9C%EC%9D%B4%EB%93%9C-Fragment-manager
https://blog.naver.com/PostView.naver?blogId=qbxlvnf11&logNo=221432824912
https://jade314.tistory.com/entry/Android-Library-Gson-Json%EC%9D%84-Java-%EA%B0%9D%EC%B2%B4%EB%A1%9C-%EB%B3%80%ED%99%98
https://kotlinlang.org/docs/serialization.html
https://lktprogrammer.tistory.com/190
