         <span class="signature">&#8594; const <a href="dart-convert/Base64Codec-class.html">Base64Codec</a></span>
                  </dt>
        <dd>
          A <a href="https://tools.ietf.org/html/rfc4648">base64url</a> encoder and decoder. <a href="dart-convert/base64Url-constant.html">[...]</a>
                  
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            <span class="signature"><code>const Base64Codec.urlSafe()</code></span>
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        </dd>
        <dt id="htmlEscape" class="constant">
          <span class