Issue with Using `this` in TypeScript Interface Properties
What's wrong? How can I use this in a property?
https://www.typescriptlang.org/play/?#code/KYDwDg9gTgLgBASwHY2FAZgQwMbDgFWAGd4BvAWACg44xMBPAGwkwBMAuOAVyQGskIAdyQBuKlRr1inANp0mLDnBgALBERkAieczaaAuvrHU4AIy4xOpWg11LV6rTsUG4AX2NuqQA
https://www.typescriptlang.org/play/?#code/KYDwDg9gTgLgBASwHY2FAZgQwMbDgFWAGd4BvAWACg44xMBPAGwkwBMAuOAVyQGskIAdyQBuKlRr1inANp0mLDnBgALBERkAieczaaAuvrHU4AIy4xOpWg11LV6rTsUG4AX2NuqQA
