public function __toString()
{
$children = $this->children;
$output = sprintf("%s ->\n", $this->rule->getName());
foreach ($children as $child) {
$childOutput = explode("\n", $child);
$childLines = array_map(function ($line) {
return sprintf("| %s\n", $line);
}, $childOutput);
$output .= implode('', $childLines);
}
return $output;
}
