@Override
    public Set<Class<? extends DecorationStrategy>> applyPost() {
        return Collections.singleton(VertexProgramStrategy.class);
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/strategy/decoration/RequirementsStrategy.java