Born to BeBug: Reverting Changes of a Published Sandbox in Oracle Fusion

There are a fair number of answers to this question on the web, the most common: NO, YOU CAN'T.

Once Sandbox has been published, you can't "rewind" it.

Unfortunately, you may be in a regrettable position where your Page went completely FUBAR due to some ill-advised changes through the Page Composer sandbox you accidentally published.

E.g., the most common workaround: creating a new Sandbox, and fixing any damage you did in an already published sandbox is not an option. Sometimes, even navigating to the page in question is no longer possible. (been there).

The first "glimpse" of the solution was introduced by Oracle note:

How can Sandbox Page Customizations be Removed From a Page? (Doc ID 2642342.1)

Regrettably, it's pretty light on technical details and chose to omit crucial info.

The most complete list of resolution techniques was provided by:

https://wpsbutton.com/reverting-changes-of-a-published-sandbox

It was originally referenced by Oracles' Community thread:

https://community.oracle.com/customerconnect/discussion/677263/can-we-roll-back-an-published-sandbox-to-revert-back-the-changes

That one is almost perfect: it has all those nice screens with cool KABOOM emoji and greatly elaborates on the technique mentioned in (Doc ID 2642342.1).

Namely, a deletion of the Page customizations' configuration file. The only setback is: that it deletes ANY changes implemented on the Page thus restoring it to a seeded functionality.

Unfortunately, one piece of the "puzzle" is still missing:

Let us assume that following the (Doc ID 2642342.1) directions you created the required new Sandbox with the Page Composer tool and even managed to "corner" the customization file through the Manage Configuration menu, where are all those "lovely" delete buttons I have been promised???