@Override
    public <V> Iterator<Property<V>> properties(final String... propertyKeys) {
        return IteratorUtils.<Property<V>, Property<V>>map(this.getBaseEdge().properties(propertyKeys), property -> new HadoopProperty<>(property, HadoopEdge.this));
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
hadoop-gremlin/src/main/java/org/apache/tinkerpop/gremlin/hadoop/structure/HadoopEdge.java