protected function prepareAutoIncludeFusion()
    {
        $autoIncludeFusion = [];
        foreach (array_keys($this->packageManager->getAvailablePackages()) as $packageKey) {
            if (isset($this->autoIncludeConfiguration[$packageKey]) && $this->autoIncludeConfiguration[$packageKey] === true) {
                $autoIncludeFusionFile = sprintf($this->autoIncludeFusionPattern, $packageKey);
                if (is_file($autoIncludeFusionFile)) {
                    $autoIncludeFusion[] = $autoIncludeFusionFile;
                }
            }
        }

        return $autoIncludeFusion;
    }