content[] = '';
}
public function endIteration()
{
$this->content[] = '
';
}
public function beginChildren()
{
$this->content[] = '';
}
public function endChildren()
{
$this->content[] = '
';
}
public function render($callback)
{
if (! is_callable($callback)) {
throw new RuntimeException('Callable expected');
}
foreach ($this as $node) {
try {
$content = call_user_func($callback, $node);
} catch (Exception $e) {
throw new RuntimeException($e);
}
$this->content[] = $content;
}
return implode("\n", $this->content);
}
}