Spatie\Php7to5\Exceptions\InvalidParameter::directoryDoesNotExist PHP Method

    public static function directoryDoesNotExist($directoryName)
    {
        return new static("Directory `{$directoryName}` does not exist");
    }

 /**
  * DirectoryConverter constructor.
  *
  * @param string $sourceDirectory
  *
  * @throws \Spatie\Php7to5\Exceptions\InvalidParameter
  */
 public function __construct($sourceDirectory)
 {
     if (!file_exists($sourceDirectory)) {
         throw InvalidParameter::directoryDoesNotExist($sourceDirectory);
     }
     $this->sourceDirectory = $sourceDirectory;
 }