private String get(String key) {
    String[] options = key.split("\\|");
    String value = null;
    for (int i = 0; i < options.length; i++) {
      String option = options[i].strip();
      value = provider.apply(normalize(option));
      if (value != null) {
        if (i != 0) {
          LOGGER.warn("Argument '{}' is deprecated", option);
        }
        break;
      }
    }
    return value;
  }
Shorthand for {@link #of(Map)} which constructs the map from a list of key/value pairs.
planetiler-core/src/main/java/com/onthegomap/planetiler/config/Arguments.java