window.onDvtagReady = function (callback, timeout = 750) {
    window.dvtag = window.dvtag || {};
    dvtag.cmd = dvtag.cmd || [];
    const opt = { callback, timeout, timestamp: new Date().getTime() };
    dvtag.cmd.push(function () { dvtag.queueAdRequest(opt); });
    setTimeout(function () {
      const cb = opt.callback;
      opt.callback = null;
      if (cb) cb();
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