protected function _outputNode($class, $node, $indent)
{
$indent = str_repeat(' ', $indent);
if ($node['alias']) {
$this->out($indent . "[" . $node['id'] . "] " . $node['alias']);
} else {
$this->out($indent . "[" . $node['id'] . "] " . $node['model'] . '.' . $node['foreign_key']);
}
}