public function target($currencies)
    {
        if (!is_array($currencies)) {
            $currencies = [$currencies];
        }

        $this->targets = $currencies;

        return $this;
    }
public function target($currencies)
    {
        if (!is_array($currencies)) {
            $currencies = [$currencies];
        }

        $this->targets = $currencies;

        return $this;
    }
public function target ( $ currencies ) { if ( ! is_array ( $ currencies ) ) { $ currencies = [ $ currencies ] ; } $ this -> targets = $ currencies ; return $ this ; }
Set the target currencies.

@param array|string $currencies
@return self
Set the target currencies .