@Override
            @ParametricNullness
            public K getElement() {
              return backingEntry.getKey();
            }

            @Override
            public int getCount() {
              return backingEntry.getValue().size();
            }
          };
        }
      };
    }

    @Override
    int distinctElements() {

		// Count errNoHealRequired across all serverPools,
		// to return appropriate error to the caller
		if errors.Is(err, errNoHealRequired) {
			countNoHeal++
		}
		r.DiskCount += result.DiskCount
		r.SetCount += result.SetCount
		r.Before.Drives = append(r.Before.Drives, result.Before.Drives...)
		r.After.Drives = append(r.After.Drives, result.After.Drives...)
	}

	// No heal returned by all serverPools, return errNoHealRequired

func mustGetPoolEndpoints(poolIdx int, args ...string) EndpointServerPools {
	drivesPerSet := len(args)
	setCount := 1
	if len(args) >= 16 {
		drivesPerSet = 16
		setCount = len(args) / 16
	}
	endpoints := mustGetNewEndpoints(poolIdx, drivesPerSet, args...)
	return []PoolEndpoints{{
		SetCount:     setCount,
		DrivesPerSet: drivesPerSet,
		Endpoints:    endpoints,
		CmdLine:      strings.Join(args, " "),
	}}