AIMA.Core.Logic.Propositional.Visitors.PositiveSymbolCollector.visitSymbol C# (CSharp) Method

        public override Object visitSymbol(Symbol symbol, Object arg)
        {
            List<Symbol> s = (List<Symbol>)arg;
            s.Add(symbol);// add ALL symbols not discarded by the visitNotSentence
            // mathod
            return arg;
        }