Access Transformer File gets Deleted

Hi! 

I tried added a file src/main/resources/META-INF/accesstransformer.cfg to my project and, well, MCreator automatically deletes it when I build the project. I tried looking for a way to set up access transformers in the project GUI and did not find anything. I also couldn't find any MCreator plugins related to this task. The project's build.gradle is generated by MCreator fresh with this snippet:

minecraft {
    ...
    accessTransformer = file('src/main/resources/META-INF/accesstransformer.cfg')
    ...
}

and this makes me think access transformers are meant to be supported. Is this an oversight? Is there a way to set up access transformers in MCreator that I am missing?

Thanks in advance.