code: func (c *Cache) GetClusterConfig(opts ...services.MarshalOption) (services.ClusterConfig, error) {
  	config, err := c.clusterConfigCache.GetClusterConfig(services.AddOptions(opts, services.SkipValidation())...)
  	if trace.IsNotFound(err) {
  		return c.ClusterConfig.GetClusterConfig(opts...)
  	}
  	return config, err
  }
docs: // GetClusterConfig gets services.ClusterConfig from the backend.