code: public static RateLimiterExports ofRateLimiter(String prefix, RateLimiter rateLimiter) {
          return new RateLimiterExports(prefix, Array.of(rateLimiter));
      }
docs: Creates a new instance of {@link RateLimiterExports} with default metrics names prefix and
  a rate limiter as a source.
  
  @param prefix the prefix of metrics names
  @param rateLimiter the rate limiter