lables">
        <dt id="toLanguageTag" class="callable">
          <span class="name"><a href="dart-ui/Locale/toLanguageTag.html">toLanguageTag</a></span><span class="signature">(<wbr>)
            <span class="returntype parameter">&#8594; <a href="dart-core/String-class.html">String</a></span>
          </span>
                  </dt>
        <dd>
          Returns a syntactically valid Unicode BCP47 Locale Identifier. <a href="dart-ui/Locale/toLanguageTag.html">[...]</a>
                  
</dd>
       