src/Data/BizField.php
public function getProperty($propertyName)
    {
        $ret = parent::getProperty($propertyName);
        if ($ret) {
            return $ret;
        }
        //if ($propertyName == "Value") return $this->getValue();
        if ($propertyName == "Value") {
            return $this->lookupValue();
        }
        return $this->$propertyName;
    }
public function getProperty($propertyName)
    {
        $ret = parent::getProperty($propertyName);
        if ($ret) {
            return $ret;
        }
        //if ($propertyName == "Value") return $this->getValue();
        if ($propertyName == "Value") {
            return $this->lookupValue();
        }
        return $this->$propertyName;
    }
Get property value

@param string $propertyName property name
@return mixed property value