code: public static Query arrayContains(String array,
                                        ArrOp op,
                                        Literal... values) {
          Query q = new Query(false);
          q.add("array", array).add("contains", op.toString()).add("values", Literal.toJson(values));
          return q;
      }
docs: <pre>
  { array: <array>, contains: <op>, values: [values] }
  </pre>