private function getAlwaysUsedPropertiesSuffixes()
{
if ($this->normalizedAlwaysUsedPropertiesSuffixes === null) {
$this->normalizedAlwaysUsedPropertiesSuffixes = SniffSettingsHelper::normalizeArray($this->alwaysUsedPropertiesSuffixes);
}
return $this->normalizedAlwaysUsedPropertiesSuffixes;
}