src/AbstractTransport.php
public function getConfig($name = null)
    {
        return is_null($name)
            ? $this->configs
            : (isset($this->configs[$name]) ? $this->configs[$name] : null);
    }
public function getConfig($name = null)
    {
        return is_null($name)
            ? $this->configs
            : (isset($this->configs[$name]) ? $this->configs[$name] : null);
    }
Get Config

@param null|string $name
@return array|mixed|null