@Override
	public Function next() {
		FunctionSymbol sym = symiter.next();
		if (sym == null)
			return null;
		Object obj = sym.getObject();
		if (obj==null) return null;
		return (Function)obj;
	}
Convert an iterator over FunctionSymbols into an iterator over the Functions
Ghidra/Features/BSim/src/main/java/ghidra/features/bsim/query/facade/FunctionSymbolIterator.java