/**
* @param string $ln
* @param int $offset
*
* @throws \RuntimeException
*/
protected function addLine($ln, $offset)
{
$s = substr($ln, $offset);
if ($s === false) {
$s = '';
}
if (!$this->tip->getIsOpen()) {
throw new RuntimeException(sprintf('Attempted to add line (%s) to closed container.', $ln));
}
$this->tip->getStrings()->add($s);
}
