public boolean isEmpty() {
		return colorMap.isEmpty() && fontMap.isEmpty() && iconMap.isEmpty() &&
			propertyMap.isEmpty();
	}
Returns true if there are not color, font, icon or property values in this map
@return true if there are not color, font, icon or property values in this map
Ghidra/Framework/Gui/src/main/java/generic/theme/GThemeValueMap.java