want: []string{"1234", "2345"},
		},
		{
			name: "Empty",
			args: args{ports: []string{}},
			want: []string{},
		},
		{
			name: "Non-parseable",
			args: args{ports: []string{"abcd", "2345", "abcd"}},
			want: []string{"abcd", "2345"},
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {

}

func registerBooleanParameter(name string, value bool, usage string) {
	rootCmd.Flags().Bool(name, value, usage)
	registerEnvironment(name, value, usage)
}

func registerEnvironment[T env.Parseable](name string, defaultValue T, usage string) {
	envName := strings.Replace(strings.ToUpper(name), "-", "_", -1)
	// Note: we do not rely on istio env package to retrieve configuration. We relies on viper.