code: public static <T extends Enum<T> & HeaderKey> Map<T, StandardField> initFullEnumMap(
  			Class<T> clazz) {
  		Map<T, StandardField> map = new EnumMap<>(clazz);
  		// loop through all values of the Enum type and add a dummy field
  		for (T key : clazz.getEnumConstants()) {
  			// TODO init correct description string
  			StandardField dummy = new StandardField(key, "not set", 0L, 0L, 0L);
  			map.put(key, dummy);
  		}
  		assert map != null;
  		return map;
  	}
docs: Initialized a map containing all keys of the Enum T as map-key and
  default StandardFields as map-value.
  <p>
  Ensures that no null value is returned.
  
  @return the fully initialized map