How can I delete master slides and all slides depending on these master slides, which should be deleted?

If deleting does not work, perhaps there is a workaround?
E.g.

• hiding specific …
• copy specific to a new pptx file …

I tried to delete master slides this way:
If I do this from the array (see below function I used) that contains the layout subfiles xml data, the powerpoint file gets corrupt and I have to repair it when I open it. Then I see that the deleted master slide has been replaced by an empty (default) one.

$files = $TBS->Plugin(OPENTBS_GET_FILES);

Thanks for any ideas