public function __construct(array $checkedPaths, array $checkedFileExtensions)
{
if (!$checkedPaths) {
throw new \InvalidArgumentException('At least 1 path to check must be specified');
}
if (!$checkedFileExtensions) {
throw new \InvalidArgumentException('At least 1 file extension to check must be specified');
}
$this->checkedPaths = $checkedPaths;
$this->checkedFileExtensions = $checkedFileExtensions;
}