new FlagCyclicEdgesTask().executeTask( graph );
DependencyGraphWalker walker = new WalkDepthFirstSearch();
WalkCollector walkCollector = new WalkCollector();
ArtifactReference startRef = toArtifactReference( "org.foo:foo-xml:1.0::jar" );
DependencyGraphNode startNode = new DependencyGraphNode( startRef );
walker.visit( graph, startNode, walkCollector );
String expectedPath[] = new String[] {
"org.foo:foo-xml:1.0::jar",
"jaxen:jaxen:1.0::jar",