private void installGlobalFontSizeOverride() {

		// only set a global size if the property is set
		Integer overrideFontInteger = SystemUtilities.getFontSizeOverrideValue();
		if (overrideFontInteger == null) {
			return;
		}

		setGlobalFontSizeOverride(overrideFontInteger);
	}
Extracts java default colors, fonts, and icons and stores them in the
{@link ThemeManager} and updates the {@link UIDefaults} by installing GColors for all
color values and installing any overridden fonts or icons.
Ghidra/Framework/Gui/src/main/java/generic/theme/laf/LookAndFeelManager.java