@Override
        protected E map(final Traverser.Admin<S> traverser) {
            return ReferenceFactory.detach(traverser.get());
        }
A strategy that detaches traversers with graph elements as references (i.e. without properties - just {@code id}
and {@code label}.

@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/strategy/finalization/ReferenceElementStrategy.java