code: private void loadHashMap(final Properties props) {
      properties.clear();
  
      @SuppressWarnings("rawtypes")
      Enumeration e = props.propertyNames();
      while (e.hasMoreElements()) {
        String key = (String) e.nextElement();
        properties.put(key, props.getProperty(key));
      }
    }
docs: Called from {@link #loadConfig} to copy the properties into the hash map
  Tsuna points out that the Properties class is much slower than a hash
  map so if we'll be looking up config values more than once, a hash map
  is the way to go
  @param props The loaded Properties object to copy