@Override
 public SOperationBuilder setRightOperand(final SExpression rightOperand) {
   operation.setRightOperand(rightOperand);
   return this;
 }
 @Override
 public SOperationBuilder setType(final SOperatorType operatorType) {
   operation.setType(operatorType);
   return this;
 }
 @Override
 public SOperationBuilder setOperator(final String operator) {
   operation.setOperator(operator);
   return this;
 }
 @Override
 public SOperationBuilder setLeftOperand(final SLeftOperand leftOperand) {
   operation.setLeftOperand(leftOperand);
   return this;
 }