Craft\Neo_BlockModel::getLocales PHP Method

    public function getLocales()
    {
        // If it's owner locale property is set, just return that
        if ($this->ownerLocale) {
            return [$this->ownerLocale];
        }
        $owner = $this->getOwner();
        // Otherwise, if we at least know the owner element, then search that for locales
        if ($owner) {
            $localeIds = [];
            foreach ($owner->getLocales() as $localeId => $localeInfo) {
                if (is_numeric($localeId) && is_string($localeInfo)) {
                    $localeIds[] = $localeInfo;
                } else {
                    $localeIds[] = $localeId;
                }
            }
            return $localeIds;
        }
        // Otherwise it's probably just available in the default site locale
        return [craft()->i18n->getPrimarySiteLocaleId()];
    }