<area shape="rect" href="$a01777.html" title="Superclass for algorithms that produce undirected graph as output." alt="" coords="17,229,220,256"> <area shape="rect" href="$a00101.html" title="Superclass for all sources, filters, and sinks in VTK." alt="" coords="69,155,168,181"> <area shape="rect" href="$a01084.html" title="abstract base class for most VTK objects" alt="" coords="79,80,159,107"> <area shape="rect" href="$a01085.html" title="abstract base class for most VTK objects" alt="" coords="64,5,173,32">