/**
* @param mixed $data
* @return mixed[] associative array of properties
*/
protected function getProperties($data)
{
$extractor = new ObjectPropertyExtractor($data);
// Call __sleep if present
if (method_exists($data, '__sleep')) {
$properties = call_user_func([$data, '__sleep']);
} else {
$properties = $extractor->getProperties();
}
$values = $extractor->getValues($properties);
// Call __wakeup if present to restore previous state
if (method_exists($data, '__wakeup')) {
call_user_func([$data, '__wakeup']);
}
return $values;
}
