Automatically add index signature to interface

index-signature_add-index-signature.ts

type IndexSignature<T extends {}> = {
  [K in keyof T]: T[K];
};
interface Hero { name: string; }
const hero: Hero = { name: 'codey' };

function addIndexSignature<T extends {}>(obj: T): IndexSignature<T> {
  return obj;
}

parseObject(addIndexSignature(hero));