l00121"></a>00121         <span class="keywordflow">return</span> mass ; 
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123 <span class="comment"></span>
<a name="l00124"></a>00124 <span class="comment">/**</span>
<a name="l00125"></a>00125 <span class="comment">   ## FUNCTION: </span>
<a name="l00126"></a>00126 <span class="comment">        set_mol_barycenter_ptr</span>
<a name="l00127"></a>00127 <span class="comment">  </span>
<a name="l00128"></a>00128 <span class="comment">   ## SPECIFICATION:</sp