code: @Override
      public Properties getAllProperties() {
          Properties props = new Properties();
          for (String name : cachedValues.keySet()) {
              props.put(name, String.valueOf(cachedValues.get(name)));
          }
          return props;
      }
docs: Only returns cached (previously-read) properties.
  For other values, refer to yaml/property files.
  Or execute CLI command <code>mdw config [name]</code>.