src/Address/Office.php
public function setCountry($country)
    {
        if(!($country instanceof Country)) {
            $country = new Country((array)$country);
        }
        return $this->setParameter('country', $country);
    }
public function setCountry($country)
    {
        if(!($country instanceof Country)) {
            $country = new Country((array)$country);
        }
        return $this->setParameter('country', $country);
    }
Set country
@param Country|array $country
@return $this