@Override
        public Traversal<Edge, Edge> get_g_EX7X_hasLabelXknowsX(final Object e7Id) {
            return g.E(e7Id).hasLabel("knows");
        }
@author Marko A. Rodriguez (http://markorodriguez.com)
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/filter/HasTest.java