          <span class="name deprecated">alpnSupported</span>
          
</section>
        
                <section class="desc markdown">
          <p>Whether the platform supports ALPN. This always returns true and will be
removed in a future release.</p>
        </section>
                <section class="summary source-code" id="source">
          <h2><span>Implementation</span></h2>
          <pre class="language-dart"><code class="language-dart">@deprecated
external static bool get alpnSupported;</cod