m.setPercentBase(LengthBase.CONTAINING_BLOCK_WIDTH);
addPropertyMaker("margin-right", m);
// space-before
m = new SpaceProperty.Maker(PR_SPACE_BEFORE);
m.useGeneric(genericSpace);
corr = new SpacePropertyMaker(m);
corr.setCorresponding(PR_MARGIN_TOP, PR_MARGIN_TOP, PR_MARGIN_RIGHT);
corr.setUseParent(false);
corr.setRelative(true);
addPropertyMaker("space-before", m);