Unfortunately, at the moment there is no possibility to change that reference by using out-of-the-box tools. We have informed our R&D department about this case so they could consider enhancing the following functionality in the upcoming releases.
At the same time, you can check the ProcessDashboardSchema module (in the UIv2 package) and the BaseNotification module (in the NUI package). Bound methods are defined inside the UIv2 package in the ProcessDashboardSchema module.
Thank you for being interested in further improvement of the Creatio application!