iv>
</dd>
        <dt id="normalize" class="callable">
          <span class="name"><a href="dart-convert/Base64Codec/normalize.html">normalize</a></span><span class="signature">(<wbr><span class="parameter" id="normalize-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="parameter" id="normalize-param-start"><span class="type-annotation"><a href="dart-core/int-class.html">int</a></span> <span 