@Override
    public void close() {
        try {
            super.close();
        } catch (Exception ignored) {
            // do nothing - this is just for testing TINKERPOP-2496
        }
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-annotations/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/dsl/SocialPackageTraversalSourceDsl.java