" id="base64Decode-param-source"><span class="type-annotation"><a href="dart-core/String-class.html">String</a></span> <span class="parameter-name">source</span></span>)
            <span class="returntype parameter">&#8594; <a href="dart-typed_data/Uint8List-class.html">Uint8List</a></span>
          </span>
                  </dt>
        <dd>
          Decodes <a href="https://tools.ietf.org/html/rfc4648">base64</a> or <a href="https://tools.ietf.org/html/rfc4648">base64url</a> encoded bytes. <a href="da