protected function isSiblingItem($line)
	{
		$siblingMarker = $this->_nestedListTypes[$this->_listDepth] == 'ol' ? '*' : '#';
		if ($line[0] !== $siblingMarker) {
			return false;
		}
		return
			($siblingMarker === '#' && preg_match('/^#{' . $this->_listDepth . '}[^#]+/', $line)) ||
			($siblingMarker === '*' && preg_match('/^\*{' . $this->_listDepth . '}[^\*]+/', $line));
	}