public static Optional<? extends Class<? extends TraversalStrategy>> getRegisteredStrategyClass(final String strategyName) {
            if (GLOBAL_REGISTRY.containsKey(strategyName))
                return Optional.of(GLOBAL_REGISTRY.get(strategyName));

            return Optional.empty();
        }
Looks up a strategy by its simple name.
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/TraversalStrategies.java