code: public T findAndModify(DBObject query, DBObject sort, DBObject update) {
          return findAndModify(query, null, sort, false, update, false, false);
      }
docs: calls {@link DBCollection#findAndModify(com.mongodb.DBObject, com.mongodb.DBObject, com.mongodb.DBObject, boolean, com.mongodb.DBObject, boolean, boolean)}
  with fields=null, remove=false, returnNew=false, upsert=false
  
  @param query  The query
  @param sort   The sort
  @param update The update to apply
  @return the old object