AIMA.Core.Logic.FOL.Parsing.AST.ConnectedSentence.ToString C# (CSharp) Method

        public override String ToString()
        {
            if (null == stringRep)
            {
                StringBuilder sb = new StringBuilder();
                sb.Append("(");
                sb.Append(first.ToString());
                sb.Append(" ");
                sb.Append(connector);
                sb.Append(" ");
                sb.Append(second.ToString());
                sb.Append(")");
                stringRep = sb.ToString();
            }
            return stringRep;
        }