@Test
public void testEmbeddedMap() {
ODocument newDoc = new ODocument();
final Map<String, ODocument> map = new HashMap<String, ODocument>();
newDoc.field("map", map);
map.put("Luca", new ODocument().field("name", "Luca"));
map.put("Marcus", new ODocument().field("name", "Marcus"));
map.put("Cesare", new ODocument().field("name", "Cesare"));
String json = newDoc.toJSON();