PreExistingConfigException::create

public static PreExistingConfigException::create($extension, array $config_objects)

public static function create($extension, array $config_objects) {
  $message = SafeMarkup::format('Configuration objects (@config_names) provided by @extension already exist in active configuration', 
  array(
    '@config_names' => implode(', ', static::flattenConfigObjects($config_objects)),
    '@extension' => $extension
  )
  );
  $e = new static($message);
  $e->configObjects = $config_objects;
  $e->extension = $extension;
  return $e;
}