src/Log.php
public function addInstance(LogOutputInterface $logger, string $instanceName = null):Log{
		$this->logOutputInterfaces[$instanceName ?? 'default'] = $logger;

		return $this;
	}
public function addInstance(LogOutputInterface $logger, string $instanceName = null):Log{
		$this->logOutputInterfaces[$instanceName ?? 'default'] = $logger;

		return $this;
	}
@param \chillerlan\Logger\Output\LogOutputInterface $logger
@param string                                       $instanceName

@return \chillerlan\Logger\Log