public boolean containsIcon(String id) {
		return iconMap.containsKey(id);
	}
Returns true if an {@link IconValue} exists in this map for the given id.
@param id the id to check
@return true if an {@link IconValue} exists in this map for the given id
Ghidra/Framework/Gui/src/main/java/generic/theme/GThemeValueMap.java