src/Data/Tools/BizRecord.php
final public function saveOldRecord(&$inputArr)
    {
        if (!$inputArr)
            return;
        foreach ($inputArr as $key => $value) {
            $bizField = $this->varValue[$key];
            if (!$bizField)
                continue;
            $bizField->saveOldValue($value);
        }
    }
final public function saveOldRecord(&$inputArr)
    {
        if (!$inputArr)
            return;
        foreach ($inputArr as $key => $value) {
            $bizField = $this->varValue[$key];
            if (!$bizField)
                continue;
            $bizField->saveOldValue($value);
        }
    }
Save old recrod,
used in update record when old record value is needed in the action

@param array $inputArr old record array
@return avoid