# Zeilen in Verzeichnisbaum einfügen
$tree->add('1000', -text => '1000',);
$tree->add('1000.1500', -text => '1500',);
$tree->add('1000.1500.1550', -text => '1550',);
$tree->add('1000.1500.1550-1', -text => '1550',);