code/Debug/Model/Logging.php
public function getRange($logFile)
    {
        if (!array_key_exists($logFile, $this->ranges)) {
            throw new Exception('Invalid log file');
        }

        return $this->ranges[$logFile];
    }
public function getRange($logFile)
    {
        if (!array_key_exists($logFile, $this->ranges)) {
            throw new Exception('Invalid log file');
        }

        return $this->ranges[$logFile];
    }
Returns position range for specified log file

@param string $logFile
@return array
@throws Exception