| 1234567891011121314151617181920 | package networkimport (	"net"	"testing")func TestIsAllIpsAvailableIPv4(t *testing.T) {	ips, err := FetchCurrentIps()	if err != nil {		t.Error(err)	}	for _, ip := range ips {		if net.ParseIP(ip.String()).To4() == nil {			t.Errorf("invalid ipv4: %s", ip.String())		}	}}
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