public void setVertexPropertyFilter(final Traversal<Vertex, ? extends Property<?>> vertexPropertyFilter) {
        this.vertexPropertyFilter = vertexPropertyFilter.asAdmin().clone();
    }
Set the filter for selecting vertex properties from the vertices.

@param vertexPropertyFilter The {@link Traversal} that will either let the vertex property pass or not.
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/computer/GraphFilter.java