@Override
    public GraphComputer vertexProperties(final Traversal<Vertex, ? extends Property<?>> vertexPropertyFilter) {
        this.graphFilter.setVertexPropertyFilter(vertexPropertyFilter);
        return this;
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
hadoop-gremlin/src/main/java/org/apache/tinkerpop/gremlin/hadoop/process/computer/AbstractHadoopGraphComputer.java