private Language getHighestPriority() {
			if (displayList.isEmpty()) {
				return null;
			}
			LanguageDescription supremeLang = null;
			for (LanguageDescription ld : displayList) {
				if (supremeLang == null) {
					supremeLang = ld;
				}
			}
			if (supremeLang == null) {
				return null;
			}
			try {
				return service.getLanguage(supremeLang.getLanguageID());
			}
			catch (LanguageNotFoundException e) {
				return null;
			}
		}
Select the highest priority language being displayed.
If more than one language has the highest priority, then the first
one will be used.
Ghidra/Features/Base/src/main/java/ghidra/app/util/bean/SelectLanguagePanel.java