public function exchangeSettings($targetExchange)
  {

    $settings = null;
    if (isset($this->configSettings['configFile']->rabbit->exchanges)) {
      foreach ($this->configSettings['configFile']->rabbit->exchanges as $exchange => $exchangeSettings) {
        if ($exchange == $targetExchange) {
          $settings = $exchangeSettings;
        }
      }
    } else {
      echo 'Error - No exchange settings found.', PHP_EOL;
    }

    // Trap exchange not found
    if ($settings == null) {
      echo 'MB_Configuration->exchangeSettings(): Error - ' . $targetExchange . ' not found in config settings.';
      exit;
    }

    return $settings;
  }