[BUG] 🐛 Roundtrip merge not working

[discoebbe]

Describe the bug
When saving the extension custom methods inside existing models are deleted

To Reproduce

1. Create a Model. Save it. Add custom methods.

2. Configure overwriteSettings for Models like:
   overwriteSettings:
   Classes:
   Controller: merge
   Domain:
   Model: merge
   Repository: merge

3. Open the Extension in Builder again and save it => all custom methods in the model class file are gone.

Expected behavior
keep custom methods and only add setters and getters for new properties

TYPO3 Version
12.4.11

Extension Builder Version:
12.0.0-beta.1

[discoebbe]

Same wrong behavior for Controllers and Repositories

[PKuhlmay]

Thank you. I will have a look at it. If you know how to solve this, pull requests are welcome 😅

[PKuhlmay]

It seems it broke at commit 733e71cf8a31d84fd3be67bb17410f003348cc94