private boolean isColumnFiltered(TableModel model, int columnModelIndex) {
		if (!(model instanceof RowObjectFilterModel<?>)) {
			return false;
		}
		RowObjectFilterModel<?> filterModel = (RowObjectFilterModel<?>) model;
		TableFilter<?> tableFilter = filterModel.getTableFilter();
		if (tableFilter == null) {
			return false;
		}
		return tableFilter.hasColumnFilter(columnModelIndex);
	}
Paints a background highlight under the icon that will get painted.
@param g2d the graphics
@param scale the current scale, up to max 
@param max the max emphasis size
@param ix the icon x
@param iy the icon y
@param iw the icon width
@param ih the icon height
Ghidra/Framework/Docking/src/main/java/docking/widgets/table/GTableHeaderRenderer.java