code: private static function validateConfig(array $config)
      {
          if (isset($config['name']) === false) {
              throw new BadUse('there\'s no name in mapping configuration');
          }
          if (isset($config['schema']) === false) {
              throw new BadUse('there\'s no schema in mapping configuration');
          }
          if (isset($config['provider']) === false) {
              throw new BadUse('there\'s no provider in mapping configuration');
          }
          if (isset($config['models']) === false) {
              throw new BadUse('there\'s no models in mapping configuration');
          }
          if (isset($config['models']['path']) === false) {
              throw new BadUse('there\'s no models.path in mapping configuration');
          }
          if (isset($config['models']['namespace']) === false) {
              throw new BadUse('there\'s no models.namespace in mapping configuration');
          }
      }
docs: Check the validation of mapping configuration.
  
  @throws BadUse if there's no name in mapping configuration
  @throws BadUse if there's no schema in mapping configuration
  @throws BadUse if there's no provider in mapping configuration
  @throws BadUse if there's no models in mapping configuration
  @throws BadUse if there's no models.path in mapping configuration
  @throws BadUse if there's no models.namespace in mapping configuration
  @param  array  $config mapping configuration