getCornerPoints() not implemented properly?

[HaasJona]

RawLocationReference.getCornerPoints() is defined to return the corner points, among others, for RECTANGLE and GRID reference types.

openlr/data/src/main/java/openlr/rawLocRef/RawLocationReference.java

Lines 258 to 267 in 0dcf49c

	/**
	* Gets the points defining the corners of an area location.
	*
	* @return a list of corner points, if the area location is of type
	* <code>POLYGON</code>, <code>RECTANGLE</code>, or
	* <code>GRID</code>, otherwise <code>null</code>
	*/
	public List<GeoCoordinates> getCornerPoints() {
	return null;
	}

However the classes openlr.rawLocRef.RawGridLocRef and openlr.rawLocRef.RawRectangleLocRef do not override this method, making it return null as the base implementation does. Am I missing something?