in pkg/metrics/collector/pod_ip_metrics.go [343:349]
func (c *podIPMetricsCollector) updateAssignedIPs(subnet *net.IPNet, totalIP uint64) {
if subnet.IP.To16() != nil && subnet.IP.To4() == nil {
c.assignedIPv6AddrCount += totalIP
} else if subnet.IP.To4() != nil {
c.assignedIPv4AddrCount += totalIP
}
}