/**
* Class constructor.
*
* @param string $_api_url The URL pointing to the custom API endpoint.
* @param string $_plugin_file Path to the plugin file.
* @param array $_api_data Optional data to send with API calls.
*
* @return Ai1ec_EDD_SL_Plugin_Updater
*/
public function __construct($_api_url, $_plugin_file, $_api_data = null)
{
$this->_timely_api_data = $_api_data;
$_api_url = $this->_modify_api_url($_api_url, $_plugin_file, $_api_data);
$this->_timely_api_url = $_api_url;
parent::__construct($_api_url, $_plugin_file, $_api_data);
$this->_timely_api_url = trailingslashit($this->_timely_api_url);
}