/**
* Add $within criteria with a $center shape to the query.
*
* @deprecated 1.1 MongoDB 2.4 deprecated $within in favor of $geoWithin
* @see Builder::geoWithinCenter()
* @see Expr::withinCenter()
* @see http://docs.mongodb.org/manual/reference/operator/center/
* @param float $x
* @param float $y
* @param float $radius
* @return self
*/
public function withinCenter($x, $y, $radius)
{
$this->expr->withinCenter($x, $y, $radius);
return $this;
}