el" href="a00177.html" title="An undirected full graph class. ">FullGraph</a> classes are very similar, but there are two differences. While this class conforms only to the <a class="el" href="a00129.html">Digraph</a> concept, <a class="el" href="a00177.html" title="An undirected full graph class. ">FullGraph</a> conforms to the <a class="el" href="a00183.html">Graph</a> concept, moreover <a class="el" href="a00177.html" title="An undirected full graph class. ">FullGraph</a> does not contain a loop for each