public function setConfig($config)
    {
        if (is_string($config)) {
            // Treat the parameter as a filepath
            $this->config = $this->createConfig($config);
        } elseif (is_array($config)) {
            $this->config = $this->createConfig($config);
        } elseif ($config instanceof ConfigInterface) {
            $this->config = $config;
        } else {
            throw new InvalidArgumentException(sprintf(
                'Configset must be an associative array, a file path, or an instance of %s',
                ConfigInterface::class
            ));
        }

        return $this;
    }