@Test
public void setValueToUnexistingSimpleField() throws Exception{
String content = "{\"@rid\":\"#20:0\",\"@version\":25,\"@class\":\"posts\",\"title\":\"title\",\"content\":\"content\",\"id\":\"a843d3f0-25fb-468c-8452-f14b1f0c6f42\",\"coll\":[1,2,3],\"tags\":[\"one\",\"two\",\"three\"]}";
String data = "{\"data\":\"title2\"}";
List<PartsLexer.Part> parts = new ArrayList<PartsLexer.Part>();
PartsLexer pl = new PartsLexer();
parts.add(pl.parse(".title2", 1));
PartsParser pp = new PartsParser(parts);
ObjectMapper om = new ObjectMapper();
JsonNode json = om.readTree(content);
JsonNode jsonData = om.readTree(data);
JsonTree.write(json, pp, jsonData.get("data"));