class Aws::Plugins::Retries::RetryQuota

def checkout_capacity(error_inspector)
  @mutex.synchronize do
    capacity_amount = if error_inspector.networking?
                        TIMEOUT_RETRY_COST
                      else
                        RETRY_COST
                      end
    # unable to acquire capacity
    return 0 if capacity_amount > @available_capacity
    @available_capacity -= capacity_amount
    capacity_amount
  end
end