code: func newLeaseManager(client *clientv3.Client, leaseReuseDurationSeconds int64, leaseReuseDurationPercent float64) *leaseManager {
  	return &leaseManager{
  		client:                    client,
  		leaseReuseDurationSeconds: leaseReuseDurationSeconds,
  		leaseReuseDurationPercent: leaseReuseDurationPercent,
  	}
  }
docs: // newLeaseManager creates a new lease manager with the number of buffered
  // leases, lease reuse duration in seconds and percentage. The percentage
  // value x means x*100%.