* v2
* v1<
* v3-v4
*
*/
v1 = graph.addVertex(new ArtifactMetadata("g","a1","1.0"));
graph.setEntry(v1);
v2 = graph.addVertex(new ArtifactMetadata("g","a2","1.0"));
v3 = graph.addVertex(new ArtifactMetadata("g","a3","1.0"));
v4 = graph.addVertex(new ArtifactMetadata("g","a4","1.0"));
// v1-->v2
graph.addEdge(v1, v2, new MetadataGraphEdge( "1.1", true, null, null, 2, 1 ) );
graph.addEdge(v1, v2, new MetadataGraphEdge( "1.2", true, null, null, 2, 2 ) );