public void addLocalChild(final Traversal.Admin<?, ?> localChildTraversal) {
        this.traversals.add(this.integrateChild((Traversal.Admin) localChildTraversal));
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/filter/ConnectiveStep.java