/**
* @throws ParseException
* @param string $line
* @return bool
*/
public function isMainAgency($line)
{
if ($this->encoding->strlen($line) < self::TYPE_OFFSET + self::TYPE_LENGTH) {
throw new ParseException("Invalid line length.");
}
return $this->encoding->substr($line, self::ISMAIN_OFFSET, 1) === '1';
}
