return object : MutableIterator<String> {
      private val delegate: MutableIterator<DiskLruCache.Snapshot> = cache.snapshots()
      private var nextUrl: String? = null
      private var canRemove = false

      override fun hasNext(): Boolean {
        if (nextUrl != null) return true

        canRemove = false // Prevent delegate.remove() on the wrong item!
        while (delegate.hasNext()) {
          try {

        // Test head() convenience method
        RequestData data = RequestDataBuilder.newRequestData().head().build();

        assertEquals(Method.HEAD, data.getMethod());
    }

    public void test_url() {
        // Test url() method
        String url = "https://example.com/path";
        RequestData data = RequestDataBuilder.newRequestData().url(url).build();

        assertEquals(url, data.getUrl());
    }