public function __call($method, $args)
{
if (substr($method, 0, 3) != 'get') {
$class = get_class($this);
throw new \Exception("Invalid method '{$method}' (class: {$class})");
}
$field = substr($method, 3);
if (isset($this->apiData[$field])) {
return $this->apiData[$field];
}
return null;
}