code: public static CircuitBreakerExports ofIterable(String prefix, Iterable<CircuitBreaker> circuitBreakers) {
          requireNonNull(prefix);
          requireNonNull(circuitBreakers);
          return new CircuitBreakerExports(prefix, circuitBreakers);
      }
docs: Creates a new instance of {@link CircuitBreakerExports} with specified metrics names prefix and
  {@link Iterable} of circuit breakers.
  
  @param prefix the prefix of metrics names
  @param circuitBreakers the circuit breakers