public function getData()
 {
     switch ($this->operator) {
         case TES4ArithmeticExpressionOperator::OPERATOR_EQUAL():
             return $this->leftValue->getData() == $this->rightValue->getData();
         case TES4ArithmeticExpressionOperator::OPERATOR_GREATER():
             return $this->leftValue->getData() > $this->rightValue->getData();
         case TES4ArithmeticExpressionOperator::OPERATOR_GREATER_OR_EQUAL():
             return $this->leftValue->getData() >= $this->rightValue->getData();
         case TES4ArithmeticExpressionOperator::OPERATOR_LESS():
             return $this->leftValue->getData() < $this->rightValue->getData();
         case TES4ArithmeticExpressionOperator::OPERATOR_LESS_OR_EQUAL():
             return $this->leftValue->getData() <= $this->rightValue->getData();
         case TES4ArithmeticExpressionOperator::OPERATOR_NOT_EQUAL():
             return $this->leftValue->getData() != $this->rightValue->getData();
     }
     throw new ConversionException("Unknown TES4ArithmeticExpressionOperator");
 }