protected function getBindingKeyForDriver($driver)
    {
        if (class_exists($driver)) {
            return $driver;
        }

        if ($this->app->bound($key = "hashid.driver.$driver")) {
            return $key;
        }
    }
protected function getBindingKeyForDriver($driver)
    {
        if (class_exists($driver)) {
            return $driver;
        }

        if ($this->app->bound($key = "hashid.driver.$driver")) {
            return $key;
        }
    }
protected function getBindingKeyForDriver ( $ driver ) { if ( class_exists ( $ driver ) ) { return $ driver ; } if ( $ this -> app -> bound ( $ key = "hashid.driver.$driver" ) ) { return $ key ; } }
Get the binding key for the driver.

@param  string  $driver
@return string|null
Get the binding key for the driver .