https://www.sitepoint.com/compile-time-immutability-in-typescript
origin - https://www.pipiscrew.com/?p=15867 compile-time-immutability-in-typescript
https://www.sitepoint.com/compile-time-immutability-in-typescript
origin - https://www.pipiscrew.com/?p=15867 compile-time-immutability-in-typescript