="va"><a href="https://matthewheun.github.io/RCLabels/reference/arrow_notation.html" class="external-link">arrow_notation</a></span><span class="op">)</span></span>
<span><span class="co">#&gt;                          Light MD</span></span>
<span><span class="co">#&gt; Electricity [from Coal]      3  3</span></span>
<span><span class="co">#&gt; Electricity [from Solar]     6  9</span></span></code></pre></div>
<p>When an <code>aggregation_map</code> is supplied, it applies to the
requested <code>piece</cod