public Map<String, String> toMap() {
    Map<String, String> result = new HashMap<>();
    for (var key : keys.get()) {
      result.put(normalize(key), get(key));
    }
    return result;
  }
Returns a map from all the arguments provided to their values.
planetiler-core/src/main/java/com/onthegomap/planetiler/config/Arguments.java