public function trendsAvailable($lat = null, $long = null)
{
// build parameters
$parameters = null;
if ($lat != null) {
$parameters['lat_for_trends'] = (double) $lat;
}
if ($long != null) {
$parameters['long_for_trends'] = (double) $long;
}
// make the call
return $this->doCall('trends/available.json', $parameters);
}