as const2021. 1. 21.https://www.typescriptlang.org/play?#code/C4TwDgpgBA4gThCwA8A5KEAewIDsAmAzlIcHAJa4DmAfFALxQAGAFhADbsD2UAJAN6oAvkwBQ48fggBjdgEMEUAGYBXXNODkuuKG05cAjGgzY8REmUq0AFLjkBbCAC4oqAJQv4iFKhrj2SFBUCEgAstCMetwG1gDkjrFuUAD0yVAAShBKEAjq0ACicHBccAA0UIAftYA37YAZDbpcAG45UIA7Q4ALo1AARFE8jp1QgD6dUIAvPYA3o4Awk+LS2oRcAQB03FTWwd7hSakZWTl40gVFJRLiquqa2roc3ABMxlg4BMSkFNTlACoMFs82do4u7p4hHx0fiiKBgqAIYAqOA6ViXHgCH4QEQpNKvcDQWJPKyxKDkYi4LjAKByQiEchUOwAIwCUGAPFAkCgsTh+j4ghEsVEQiOohOGi0Oh6AGZbqYHp8rG8PtjqDRbA5nK4PLBAWhgaDwZDobCeuykSjSVBprhSNz-IFVkgAJpcFQfEVxEB2xKoqAAeQA1lMZnMIIsuMsrcBbSoNmlYnrnSouUAtypescript