public void checkWalls() {
        if (north.wallType.equals(WallType.Unknown)) {
            EobLogger.println("Unknown type of north wall id: " + north.wallId + " [" + x + "," + y + "]");
        }
        if (east.wallType.equals(WallType.Unknown)) {
            EobLogger.println("Unknown type of east wall id: " + east.wallId + " [" + x + "," + y + "]");
        }
        if (south.wallType.equals(WallType.Unknown)) {
            EobLogger.println("Unknown type of south wall id: " + south.wallId + " [" + x + "," + y + "]");
        }
        if (west.wallType.equals(WallType.Unknown)) {
            EobLogger.println("Unknown type of west wall id: " + west.wallId + " [" + x + "," + y + "]");
        }
    }