// some columns can be percentages while others are fixed
// so we need to make 2 passes
for (int i = 0; i < count; i++) {
Component c = container.getItem(i);
c.el().makePositionable(true);
c.el().setStyleAttribute("margin", "0px");
RowData data = (RowData) getLayoutData(c);
if (data == null) {
data = new RowData();
setLayoutData(c, data);