own"
      aria-haspopup="listbox"
      aria-controls="pst-version-switcher-list-2"
      aria-label="Version switcher list"
    >
      Choose version  <!-- this text may get changed later by javascript -->
      <span class="caret"></span>
    </button>
    <div id="pst-version-switcher-list-2"
      class="version-switcher__menu dropdown-menu list-group-flush py-0"
      role="listbox" aria-labelledby="pst-version-switcher-button-2">
      <!-- dropdown will be populated by javascript on page load -->
 