}

func (d decomError) Error() string {
	return d.Err
}

type poolSpaceInfo struct {
	Free  int64
	Total int64
	Used  int64
}

func (z *erasureServerPools) getDecommissionPoolSpaceInfo(idx int) (pi poolSpaceInfo, err error) {
	if idx < 0 {
		return pi, errInvalidArgument
	}
	if idx+1 > len(z.serverPools) {
		return pi, errInvalidArgument
	}