UIMAlert(["alert-success"], 
  H5Button(["btn-close"], ["type":"button", "aria-label":"Close"]))

<div class="alert alert-success" role="alert">
  <button type="button" class="btn-close" aria-label="Close"></button>
</div>

UIMAlert(["alert-success"], 
  H5Button(["btn-close"], ["type":"button", "aria-label":"Close", "disabled":"disabled"]))

<div class="alert alert-success" role="alert">
  <button type="button" class="btn-close" aria-label="Close" disabled=""></button>
</div>

UIMAlert(["bg-dark"], 
  H5Button(["btn-close", "btn-close-white"], ["type":"button", "aria-label":"Close", "disabled":"disabled"]), 
  H5Button(["btn-close", "btn-close-white"], ["type":"button", "aria-label":"Close", "disabled":"disabled"]))

<div class="alert bg-dark" role="alert">
  <button type="button" class="btn-close btn-close-white" aria-label="Close"></button>
  <button type="button" class="btn-close btn-close-white" aria-label="Close" disabled=""></button>
</div>