message: TS: more mapped types
diff: @@ -80,6 +80,10 @@ describe("TypeScript", function() {
  check([
  'type Readonly<T> = {',
  ' readonly [P in keyof T]: T[P];',
  + '};',
  + '',
  + 'type Pick<T, K extends keyof T> = {',
  + ' [P in K]: T[P];',
  '};'
  ]);
  