getNearest options not working

[h1k3]

The following does not work. It shoots back an error saying maxDist not recognized optional parameter. Is there a slight change to spelling that I'm not aware of or something? I want to change the distance to user defined and also change the number of records received. Any help with finding the updated parameters?
Thank you in advance,
Lance
$secretBase = r\point(-122.422876,37.777128);
r\table('hideouts')->getNearest($secretBase,
array('index' => 'location', 'maxDist' => 5000)
)->run($conn)