/**
* @singleton method used to instantiate class object
* @access public
* @param \EE_Request $request
* @param \EE_Response $response
* @return \EE_Dependency_Map instance
*/
public static function instance(EE_Request $request = null, EE_Response $response = null)
{
// check if class object is instantiated, and instantiated properly
if (!self::$_instance instanceof EE_Dependency_Map) {
self::$_instance = new EE_Dependency_Map($request, $response);
}
return self::$_instance;
}
