 class="op">=</span> <span class="va">tpm</span><span class="op">[</span><span class="st">'MS4A1'</span>, , drop <span class="op">=</span> <span class="cn">FALSE</span><span class="op">]</span>,</span></span>
<span class="r-in"><span>                     metadata <span class="op">=</span> <span class="va">metadata</span>,</span></span>
<span class="r-in"><span>                     dispersion <span class="op">=</span> <span class="va">disp</span>,</span></span>
<span class="r-in"><span>                     v