public function setFee($fee)
    {
        NumericValidator::validate($fee, "Fee");
        $fee = Formatter::formatToPrice($fee);
        $this->fee = $fee;
        return $this;
    }
public function setFee($fee)
    {
        NumericValidator::validate($fee, "Fee");
        $fee = Formatter::formatToPrice($fee);
        $this->fee = $fee;
        return $this;
    }
public function setFee ( $ fee ) { NumericValidator :: validate ( $ fee , "Fee" ) ; $ fee = Formatter :: formatToPrice ( $ fee ) ; $ this -> fee = $ fee ; return $ this ; }
Fee charged by PayU. In case of a refund,
this is the fee amount refunded to the original recipient of the payment.

@param string|double $fee

@return $this
Fee charged by PayU . In case of a refund this is the fee amount refunded to the original recipient of the payment .