<code class="lang-javascript"><code class="source-code prettyprint">Corrode.addExtension(&apos;containerIndex&apos;, function containerIndexParser(header){
    if(typeof header === &apos;string&apos;){
        header = this.vars[header];
    }

    ...
});</code>
</code></pre>
<pre><code class="lang-javascript"><code class="source-code prettyprint">Corrode.addExtension(&apos;container&apos;, function containerParser(){
    this
        .ext.containerHeader(&apos;header&apos;)
        .ext.containerIndex(&ap