# Functions
RegisterMetricAndTrackRateLimiterUsage registers a metric ownerName_rate_limiter_use in prometheus to track how much used rateLimiter is and starts a goroutine that updates this metric every updatePeriod.
UnregisterMetricAndUntrackRateLimiterUsage unregisters a metric ownerName_rate_limiter_use from prometheus and stops the goroutine that updates this metric.