@Override
	public void setUI(LabelUI ui) {

		super.setUI(ui);

		if (baseFontId == null) {
			return; // initializing
		}

		Font font = Gui.getFont(baseFontId);
		updateDefaultFont(font);

		font = Gui.getFont(fixedWidthFontId);
		fixedWidthFont = font;
	}
Sets this renderer's fixed width theme font id.  
@param fontId the font id
@see Gui#registerFont(Component, String)
Ghidra/Framework/Docking/src/main/java/docking/widgets/AbstractGCellRenderer.java