For the user interface projects, this means to delete the _plugin.xml files and add the manifest header Model-Fragment: fragment.e4xmi;apply=always to the bnd.bnd files.
As the registering of the model fragments is now more dynamic, the Position in list attribute should be added the model fragment contributions, to ensure that the ordering of the tabs stays as expected.
This is actually not a bug report. It is a suggestion for an improvement regarding the project structure of the UI projects.
With Eclipse 4.20 the platform introduced a way to register model fragments without the usage of extension points.
[Register Model fragments via Manifest header](https://eclipse.dev/eclipse/news/4.20/platform_isv.php#register-model-fragment)
For the user interface projects, this means to delete the _plugin.xml files and add the manifest header
Model-Fragment: fragment.e4xmi;apply=always
to the bnd.bnd files.As the registering of the model fragments is now more dynamic, the Position in list attribute should be added the model fragment contributions, to ensure that the ordering of the tabs stays as expected.