public <T extends Element> void createKeyIndex(final String key, final Class<T> elementClass, final Parameter... indexParameters) {
final OrientBaseGraph g = acquire();
try {
g.createKeyIndex(key, elementClass, indexParameters);
} finally {
g.shutdown();
}
}
@Override
public <T extends Element> Set<String> getIndexedKeys(final Class<T> elementClass) {