}
for (Entry<P2jLogicalRelationalOperator, Node> e : graphMap.entrySet()) {
Node node = e.getValue();
attributeGraphNode(node, e.getKey());
if (!appendToSubgraph(subgraphs, node, e.getKey())) {
gv.node(node);
}
for (String i : e.getKey().getSuccessors()) {
P2jLogicalRelationalOperator dst = p2jMap.get(i);
Edge edge = new Edge(node, graphMap.get(dst));
gv.edge(edge);