code: func (m *metricExchange) DefaultCollector() *metricCollector.DefaultMetricCollector {
  	if len(m.metricCollectors) < 1 {
  		panic("No Metric Collectors Registered.")
  	}
  	collection, ok := m.metricCollectors[0].(*metricCollector.DefaultMetricCollector)
  	if !ok {
  		panic("Default metric collector is not registered correctly. The default metric collector must be registered first.")
  	}
  	return collection
  }
docs: // The Default Collector function will panic if collectors are not setup to specification.