function getDefaultCredit() {
  if (!defined(defaultCredit)) {
    let logo = buildModuleUrl("Assets/Images/ion-credit.png");

    // When hosting in a WebView, the base URL scheme is file:// or ms-appx-web://
    // which is stripped out from the Credit's <img> tag; use the full path instead
    if (
      logo.indexOf("http://") !== 0 &&
      logo.indexOf("https://") !== 0 &&
      logo.indexOf("data:") !== 0
    ) {
      const logoUrl = new Uri(logo);
      logo = logoUrl.path();
    }

    defaultCredit = new Credit(
      `<a href="https://cesium.com/" target="_blank"><img src="${logo}" style="vertical-align: -7px" title="Cesium ion"/></a>`,
      true,
    );
  }

  if (!CreditDisplay._cesiumCreditInitialized) {
    CreditDisplay._cesiumCredit = defaultCredit;
    CreditDisplay._cesiumCreditInitialized = true;
  }
  return defaultCredit;
}
Returns true if this object was destroyed; otherwise, false.
<br /><br />

@returns {boolean} <code>true</code> if this object was destroyed; otherwise, <code>false</code>.