def throttle_connection_rate
      now = Time.now
      delta = now - (last_new_connection_at || now)
      _throttle(delta, now) if delta < OandaAPI.configuration.min_new_connection_interval &&
                                       OandaAPI.configuration.use_request_throttling?
      self.last_new_connection_at = Time.now
    end
def throttle_connection_rate
      now = Time.now
      delta = now - (last_new_connection_at || now)
      _throttle(delta, now) if delta < OandaAPI.configuration.min_new_connection_interval &&
                                       OandaAPI.configuration.use_request_throttling?
      self.last_new_connection_at = Time.now
    end
Throttles the connection rate by sleeping for a duration
  if the interval bewteen consecutive connections is less
  than the allowed minimum. Only throttles when the API
  is configured to use_request_throttling.
 @return [void]