/**
* Getting the instance object
*
* This method will return the instance of itself, if instance not exists, becauses of it's called for the first
* time, the instance will be created.
*
* @return null|Yoast_Google_Analytics
*/
public static function get_instance()
{
if (is_null(self::$instance)) {
self::$instance = new self();
}
return self::$instance;
}
