Function f

packages/core/test/lib/utils/syncpromise.test.ts:74–83

(s: SyncPromise<string>, prepend: string)

    });

    const f = (s: SyncPromise<string>, prepend: string) =>
      new SyncPromise<string>(resolve => {
        void s
          .then(val => {
            resolve(prepend + val);
          })
          .then(null, () => {
            // no-empty
          });
      });

    return (
      c