([][]string) (len=2) {
  ([]string) (len=2) {
    (string) (len=11) "default-key",
    (string) (len=23) "default-value (default)"
  },
  ([]string) (len=2) {
    (string) (len=26) "default-key-with-empty-val",
    (string) (len=17) "<unset> (default)"
  }
}
