The next generation Xoops\Module\Admin makes a few changes to the module administration class methods. With Xmf\Module\Admin you can begin using the new methods now for forward compatibility.
Here are examples of the standard index and about pages.
Note the setPaypal() call. In the next generation, PayPal information is set in xoops_version.php instead as a parameter to renderAbout(). The call satisfies the requirements in 2.5 systems, and will cause no harm in later versions, but accomplish nothing.
Use these examples and apply the concepts to any other administration scripts your module uses to make them forward compatible, too.