ObjectNode row = Json.newObject();
row.put("0", a);
row.put("1", x);
row.put("2", y);
ObjectNode row = Json.newObject();
row.put("0",ObjectNode row = Json.newObject();
row.put("0", a);
row.put("1", x);
row.put("2", y);
ObjectNode row = Json.newObject();
row.put("0",