* @return The block size (in Java2D units, never <code>null</code>).
*/
public Size2D arrange(final GC g2, final RectangleConstraint constraint) {
final RectangleConstraint contentConstraint = this
.toContentConstraint(constraint);
final LengthConstraintType w = contentConstraint
.getWidthConstraintType();
final LengthConstraintType h = contentConstraint
.getHeightConstraintType();
Size2D contentSize = null;
if (w == LengthConstraintType.NONE) {
if (h == LengthConstraintType.NONE) {
contentSize = this.arrangeNN(g2);