ss="va">x</span><span class="op">[[</span><span class="va">i</span><span class="op">]</span><span class="op">]</span></span>
<span></span>
<span><span class="co"># S3 method for class 'metaMDB'</span></span>
<span><span class="va">x</span><span class="op">$</span><span class="va">i</span></span>
<span></span>
<span><span class="co"># S3 method for class 'metaMDB'</span></span>
<span><span class="fu"><a href="https://rdrr.io/r/base/list.html" class="external-link">as.list</a></span><span class="op">(</span><