code: func DefaultConfig() *Config {
  	return &Config{
  		HeartbeatPeriod:       DefaultHeartBeatPeriod,
  		HeartbeatEpsilon:      defaultHeartBeatEpsilon,
  		RateLimitPeriod:       defaultRateLimitPeriod,
  		GracePeriodMultiplier: defaultGracePeriodMultiplier,
  	}
  }
docs: // DefaultConfig returns default config for Dispatcher.