I want to use TypeScript by pulling out the mold inside the associative array.

type Outside={
  key: {
    a: number;
    b:string;
  }
}

// I want to create an inside type from an outside type key (the outside type must not be changed)
// typeInside=typeofOutside.key // 'Outside' refers only to the type, but it is used as a value here. ts(2693)

const v —Inside=getOutsideValue().key;