t();
    xhr.open("GET", "https://issuer.example/");
    xhr.setPrivateToken({
      version: 1,
      operation: "token-request"
    });
  } catch (e) {
    num_enabled--;
  }
  parent.postMessage({
    type: 'availability-result',
    num_operations_enabled: num_enabled,
  }, '*');
}
</script>
