code: final public function getConfig()
      {
          if (null === $this->config) {
              $this->config = [];
  
              $configFile = $this->getModuleDir() . PHP_DS . 'config'
                          . PHP_DS . 'system.config.php';
  
              if (file_exists($configFile)) {
                  $this->config = (array) require $configFile;
              }
          }
  
          return $this->config;
      }
docs: Gets the system configuration, which is necessary for the module.
  
  @return array The system configuration