message: Change placeholder language code to "zz"
diff: @@ -94,7 +94,7 @@ const GCP_BILLING_ACCOUNTS: gcp.BillingAccount[] =
  export class TestApp extends LitElement {
  @property({type: String}) dir = 'ltr';
  @property({type: Function}) localize: (...args: string[]) => string = fakeLocalize;
  - @property({type: String}) language = 'es-419'; // Replaced asynchronously in the constructor.
  + @property({type: String}) language = 'zz'; // Replaced asynchronously in the constructor.
  @property({type: Boolean}) savePerKeyDataLimitSuccessful = true;
  @property({type: Number}) keyDataLimit: number|undefined;
  @property({type: String}) gcpRefreshToken = '';
  