Doctrine\MongoDB\Query\Expr::nearSphere PHP Method

    public function nearSphere($x, $y = null)
    {
        if ($x instanceof Point) {
            $x = $x->jsonSerialize();
        }
        if (is_array($x)) {
            return $this->operator('$nearSphere', ['$geometry' => $x]);
        }
        return $this->operator('$nearSphere', [$x, $y]);
    }

 public function testMaxDistanceWithNearSphereAndLegacyCoordinates()
 {
     $expr = new Expr();
     $expr->nearSphere(1, 2);
     $this->assertSame($expr, $expr->maxDistance(1));
     $this->assertEquals(array('$nearSphere' => array(1, 2), '$maxDistance' => 1), $expr->getQuery());
 }