private void addUnresolvedSymbol(FunctionRecord functionRecord, String symbol,
			FidHashQuad fidHashQuad) {
		Set<ChildSymbol> set = unresolvedSymbols.get(functionRecord);
		if (set == null) {
			set = new HashSet<>();
			unresolvedSymbols.put(functionRecord, set);
		}
		ChildSymbol childSym = new ChildSymbol();
		childSym.name = symbol;
		childSym.hashQuad = fidHashQuad;
		set.add(childSym);
	}
Adds an unresolved symbol (for resolution later).
@param functionRecord the function record
@param symbol is the symbol name
Ghidra/Features/FunctionID/src/main/java/ghidra/feature/fid/service/FidServiceLibraryIngest.java