},
		{
			name:     "mixed",
			input:    []interface{}{"s1", "s2", []string{"s3", "s4"}, "", "s5", []string{}, []string{"s6"}, "s7"},
			expected: "s1 s2 s3 s4  s5  s6 s7\n",
		},
	}
	testBuffer := NewLineBuffer()
	for _, testCase := range testCases {
		t.Run(testCase.name, func(t *testing.T) {
			testBuffer.Reset()
			testBuffer.Write(testCase.input...)

	Lines() int
}

var _ logr.Marshaler = &realLineBuffer{}

type realLineBuffer struct {
	b     bytes.Buffer
	lines int
}

// NewLineBuffer returns a new "real" LineBuffer
func NewLineBuffer() LineBuffer {
	return &realLineBuffer{}
}

// Write is part of LineBuffer
func (buf *realLineBuffer) Write(args ...interface{}) {
	for i, arg := range args {
		if i > 0 {

		iptablesData:             bytes.NewBuffer(nil),
		existingFilterChainsData: bytes.NewBuffer(nil),
		filterChains:             proxyutil.NewLineBuffer(),
		filterRules:              proxyutil.NewLineBuffer(),
		natChains:                proxyutil.NewLineBuffer(),
		natRules:                 proxyutil.NewLineBuffer(),
		localhostNodePorts:       localhostNodePorts,
		nodePortAddresses:        nodePortAddresses,

		iptablesData:          bytes.NewBuffer(nil),
		filterChainsData:      bytes.NewBuffer(nil),
		natChains:             proxyutil.NewLineBuffer(),
		natRules:              proxyutil.NewLineBuffer(),
		filterChains:          proxyutil.NewLineBuffer(),
		filterRules:           proxyutil.NewLineBuffer(),
		netlinkHandle:         NewNetLinkHandle(ipFamily == v1.IPv6Protocol),
		ipset:                 ipset,

		iptablesData:          bytes.NewBuffer(nil),
		filterChainsData:      bytes.NewBuffer(nil),
		natChains:             proxyutil.NewLineBuffer(),
		natRules:              proxyutil.NewLineBuffer(),
		filterChains:          proxyutil.NewLineBuffer(),
		filterRules:           proxyutil.NewLineBuffer(),
		netlinkHandle:         netlinkHandle,
		ipsetList:             ipsetList,

		iptablesData:             bytes.NewBuffer(nil),
		existingFilterChainsData: bytes.NewBuffer(nil),
		filterChains:             proxyutil.NewLineBuffer(),
		filterRules:              proxyutil.NewLineBuffer(),
		natChains:                proxyutil.NewLineBuffer(),
		natRules:                 proxyutil.NewLineBuffer(),
		nodeIP:                   netutils.ParseIPSloppy(testNodeIP),
		localhostNodePorts:       true,