text: //// [getterErrorMessageNotDuplicated.ts]
  interface Thing {
      get style(): Foo;
      set style(cssText: string | Bar);
  }
  
  interface Foo {
      hello: string;
      world: number;
  }
  
  interface Bar extends Foo {
      extra: any;
  }
  
  //// [getterErrorMessageNotDuplicated.js]
  