@Override
        public Traversal<Vertex, Vertex> get_g_V_pageRank_hasXpageRankX() {
            return g.V().pageRank().has(PageRankVertexProgram.PAGE_RANK);
        }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/PageRankTest.java