code/Debug/Model/Service.php
public function getModuleConfigFilePath($moduleName)
    {
        $config = $this->getConfig();
        $moduleConfig = $config->getModuleConfig($moduleName);

        if (!$moduleConfig) {
            throw  new Exception("Unable to find module '{$moduleName}'");
        }

        return $config->getOptions()->getEtcDir() . DS . 'modules' . DS . $moduleName . '.xml';
    }
public function getModuleConfigFilePath($moduleName)
    {
        $config = $this->getConfig();
        $moduleConfig = $config->getModuleConfig($moduleName);

        if (!$moduleConfig) {
            throw  new Exception("Unable to find module '{$moduleName}'");
        }

        return $config->getOptions()->getEtcDir() . DS . 'modules' . DS . $moduleName . '.xml';
    }
Returns module configuration file

@param $moduleName
@return string
@throws Exception