PayPal\Api\FundingSource::setFundingMode PHP Method

specifies funding mode of the instrument Valid Values: ["INSTANT_TRANSFER", "MANUAL_BANK_TRANSFER", "DELAYED_TRANSFER", "ECHECK", "PAY_UPON_INVOICE"]

public setFundingMode ( string $funding_mode )
$funding_mode	string

    public function setFundingMode($funding_mode)
    {
        $this->funding_mode = $funding_mode;
        return $this;
    }

FundingSource