@Override
	public TableCellRenderer getHeaderRenderer(int index) {
		return tableColumns.get(index).getHeaderRenderer();
	}
Gets the special header cell renderer for the specified table field column. A null value
indicates that this column uses a default header renderer.

@param index the model column index
@return a table cell renderer for this field's header. Otherwise, null if a default renderer
        should be used.
Ghidra/Framework/Docking/src/main/java/docking/widgets/table/GDynamicColumnTableModel.java