private boolean isUndefined(CodeUnit cu) {
			if (cu == null) {
				return false;
			}
			if (cu instanceof Instruction) {
				return false;
			}
			Data data = (Data) cu;
			return Undefined.isUndefined(data.getDataType());
		}
Uses the StringsAnalyzer model to determine if the current FoundString is a high confidence word.

@param foundString
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/string/CombinedStringSearcher.java