ase64Codec.html">Base64Codec</a>()</code></span>
          </div>
        </dd>
        <dt id="base64Url" class="constant">
          <span class="name "><a href="dart-convert/base64Url-constant.html">base64Url</a></span>
          <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.h