scroller.setContent(spacer);
scroller.setExpandHorizontal(true);
scroller.setExpandVertical(false);
final GroupingMethod defaultGrouping = GroupingMethod.valueOf(prefStore
.getString(key));
attributeEditors = new AttributeGroups(spacer, editor.getAlgorithmDescriptor(),
defaultGrouping, null, Collections.<String, Object> emptyMap());
attributeEditors.setLayoutData(GridDataFactory.fillDefaults().grab(true, true)