/**
* Add $nearSphere criteria to the query.
*
* A GeoJSON point may be provided as the first and only argument for
* 2dsphere queries. This single parameter may be a GeoJSON point object or
* an array corresponding to the point's JSON representation.
*
* @see Expr::nearSphere()
* @see http://docs.mongodb.org/manual/reference/operator/nearSphere/
* @param float|array|Point $x
* @param float $y
* @return self
*/
public function nearSphere($x, $y = null)
{
$this->expr->nearSphere($x, $y);
return $this;
}
