code: public QueryBuilder near(final double x, final double y, final double maxDistance) {
          addOperand(QueryOperators.NEAR,
                     asList(x, y));
          addOperand(QueryOperators.MAX_DISTANCE,
                     maxDistance);
          return this;
      }
docs: Equivalent of the $near operand
  
  @param x           x coordinate
  @param y           y coordinate
  @param maxDistance max distance
  @return {@code this}