@Given("the {word} graph")
    public void givenTheXGraph(final String graphName) {
        if (graphName.equals("empty"))
            this.g = world.getGraphTraversalSource(null);
        else
            this.g = world.getGraphTraversalSource(GraphData.valueOf(graphName.toUpperCase()));
    }
Some implementations of {@link VertexProperty} are not {@code Serializable} and may lead to test failures when passed as
parameters. One such instance is {@code HadoopVertexProperty}. This method detaches vertex properties as tests
should never require implementation-specific elements.
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/features/StepDefinition.java