WellCommerce\Bundle\CurrencyBundle\Entity\CurrencyRate::setExchangeRate PHP Method

    public function setExchangeRate(float $exchangeRate)
    {
        $this->exchangeRate = $exchangeRate;
    }

 public function create() : CurrencyRateInterface
 {
     $currencyRate = new CurrencyRate();
     $currencyRate->setExchangeRate(1);
     $currencyRate->setCurrencyFrom('');
     $currencyRate->setCurrencyTo('');
     return $currencyRate;
 }