public static function randLocation($items = -1) {
$rawLocations = PkTestGenerator::randData(static::$ca_cities, $items);
if ($items === -1) return static::locationAssoc($rawLocations);
$assocLocs = [];
foreach ($rawLocations as $rawLocation) {
$assocLocs[] = static::locationAssoc($rawLocation);
}
return $assocLocs;
}
