private function buildKey(TaxGroupInterface $taxGroup, CountryInterface $country, $business = false)
    {
        return sprintf('%s-%s-%s', $taxGroup->getId(), $country->getId(), (int)$business);
    }
private function buildKey(TaxGroupInterface $taxGroup, CountryInterface $country, $business = false)
    {
        return sprintf('%s-%s-%s', $taxGroup->getId(), $country->getId(), (int)$business);
    }
private function buildKey ( TaxGroupInterface $ taxGroup , CountryInterface $ country , $ business = false ) { return sprintf ( '%s-%s-%s' , $ taxGroup -> getId ( ) , $ country -> getId ( ) , ( int ) $ business ) ; }
Builds the cache key.

@param TaxGroupInterface $taxGroup
@param CountryInterface  $country
@param bool              $business

@return string
Builds the cache key .