([][]string) (len=3) {
  ([]string) (len=2) {
    (string) (len=11) "default-key",
    (string) (len=23) "default-value (default)"
  },
  ([]string) (len=2) {
    (string) (len=13) "initial.key.1",
    (string) (len=6) "value1"
  },
  ([]string) (len=2) {
    (string) (len=13) "initial.key.2",
    (string) (len=6) "value2"
  }
}
