})
        .then(onFulfilled, onRejected);
  }
}

/**
 * Subset of the elemental2 IThenable interface without the single-parameter overload, which allows
 * us to implement it using a default implementation in J2cl ListenableFuture.
 */
@JsType(isNative = true, namespace = JsPackage.GLOBAL, name = "IThenable")
interface IThenable<T extends @Nullable Object> {

 * family. <b>Avoid</b> creating a mock or stub {@code Future}. Mock and stub implementations are
 * fragile because they assume that only certain methods will be called and because they often
 * implement subtleties of the API improperly.
 *
 * <p><b>Custom implementation</b>: Avoid implementing {@code ListenableFuture} from scratch. If you

 * family. <b>Avoid</b> creating a mock or stub {@code Future}. Mock and stub implementations are
 * fragile because they assume that only certain methods will be called and because they often
 * implement subtleties of the API improperly.
 *
 * <p><b>Custom implementation</b>: Avoid implementing {@code ListenableFuture} from scratch. If you