sub new {
   my ($pkg, $server, $user, $timeout, @args) = @_;

  # some special class specific stuff

  # ... is params for super class structure
  my $ftp = Net::FTP->new(...);
  $ftp->server($server);
  $ftp->user($user);
  $ftp->timeout($timeout);
  $ftp->initialize();

  my $self = { ftpHandle => $ftp };
  return bless($self, $pkg);
}