mop.update(new Point2D.Double(StrictGeomUtility.toExternalValue(currentY), 0), 1);
mop.finish();
currentY += height + gap;
}
final MassElementStyleUndoEntry massElementStyleUndoEntry = builder.finish();
getActiveContext().getUndo().addChange(ActionMessages.getString("DistributeHorizontalJustifyAction.UndoName"), massElementStyleUndoEntry);
}