bracket_notation</a></span><span class="op">)</span></span>
<span><span class="co">#&gt;       Motors -&gt; MD Cars -&gt; MD LED lamps -&gt; Light</span></span>
<span><span class="co">#&gt; Coal             1          2                  3</span></span>
<span><span class="co">#&gt; Solar            4          5                  6</span></span>
<span><span class="fu"><a href="../reference/rename_to_piece_byname.html">rename_to_piece_byname</a></span><span class="op">(</span><span class="va">m_pieces</span>, p