internal override void CollectInputExpressions(List <StatementSyntax> expressions)
        {
            // Base will traverse to input nodes
            base.CollectInputExpressions(expressions);

            string firstVariableName = null, secondVariableName = null;

            // Save names of variables
            firstVariableName  = m_inputANode.VariableSyntaxName(ObjectBuilder.InputAID.VariableName);
            secondVariableName = m_inputBNode != null?m_inputBNode.VariableSyntaxName(ObjectBuilder.InputBID.VariableName) : "null";

            if (m_inputBNode == null && ObjectBuilder.Operation != "==" && ObjectBuilder.Operation != "!=")
            {
                throw new Exception("Null check with Operation " + ObjectBuilder.Operation + " is prohibited.");
            }

            // Create expression for arithmetic operation
            Debug.Assert(!string.IsNullOrEmpty(firstVariableName) && !string.IsNullOrEmpty(secondVariableName));
            expressions.Add(
                MySyntaxFactory.ArithmeticStatement(
                    VariableSyntaxName(),
                    firstVariableName,
                    secondVariableName,
                    ObjectBuilder.Operation)
                );
        }
        internal override void CollectInputExpressions(List <StatementSyntax> expressions)
        {
            // Base will traverse to input nodes
            base.CollectInputExpressions(expressions);

            string firstVariableName = null, secondVariableName = null;

            // Save names of variables
            firstVariableName  = m_inputANode.VariableSyntaxName(ObjectBuilder.InputAID.VariableName);
            secondVariableName = m_inputBNode.VariableSyntaxName(ObjectBuilder.InputBID.VariableName);

            // Create expression for arithmetic operation
            Debug.Assert(!string.IsNullOrEmpty(firstVariableName) && !string.IsNullOrEmpty(secondVariableName));
            expressions.Add(
                MySyntaxFactory.ArithmeticStatement(
                    VariableSyntaxName(),
                    firstVariableName,
                    secondVariableName,
                    ObjectBuilder.Operation)
                );
        }