Closure detected instead of method about phpmetrics HOT 6 CLOSED

[Exception]
  a 'Exception' exception occured analyzing file ./mailchimp/MCAPI.class.php
  Message: Closure detected instead of method
  Details:
  ------------
  Stack:
  #0 phar:///usr/local/bin/phpmetrics/src/Hal/Component/OOP/Extractor/Extractor.php(127): Hal\Component\OOP\Extractor\MethodExtractor->extract(4805, Object(Hal\Compon
  ent\Token\TokenCollection))
  #1 phar:///usr/local/bin/phpmetrics/src/Hal/Application/Command/Job/Analyze/FileAnalyzer.php(138): Hal\Component\OOP\Extractor\Extractor->extract('./html/sites/al..
  .')
  #2 phar:///usr/local/bin/phpmetrics/src/Hal/Application/Command/Job/DoAnalyze.php(121): Hal\Application\Command\Job\Analyze\FileAnalyzer->execute('./html/sites/al..
  .')
  #3 phar:///usr/local/bin/phpmetrics/src/Hal/Application/Command/Job/Queue.php(51): Hal\Application\Command\Job\DoAnalyze->execute(Object(Hal\Component\Result\Result
  Collection), Object(Hal\Component\Result\ResultCollection))
  #4 phar:///usr/local/bin/phpmetrics/src/Hal/Application/Command/RunMetricsCommand.php(119): Hal\Application\Command\Job\Queue->execute(Object(Hal\Component\Result\R
  esultCollection), Object(Hal\Component\Result\ResultCollection))
  #5 phar:///usr/local/bin/phpmetrics/vendor/symfony/console/Symfony/Component/Console/Command/Command.php(253): Hal\Application\Command\RunMetricsCommand->execute(Ob
  ject(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
  #6 phar:///usr/local/bin/phpmetrics/vendor/symfony/console/Symfony/Component/Console/Application.php(874): Symfony\Component\Console\Command\Command->run(Object(Sym
  fony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
  #7 phar:///usr/local/bin/phpmetrics/vendor/symfony/console/Symfony/Component/Console/Application.php(195): Symfony\Component\Console\Application->doRunCommand(Objec
  t(Hal\Application\Command\RunMetricsCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
  #8 phar:///usr/local/bin/phpmetrics/vendor/symfony/console/Symfony/Component/Console/Application.php(126): Symfony\Component\Console\Application->doRun(Object(Symfo
  ny\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
  #9 /usr/local/bin/phpmetrics(17): Symfony\Component\Console\Application->run()
  #10 {main}
  ------------
  Do not hesitate to report a bug: https://github.com/Halleck45/PhpMetrics/issues