I translate one dsl (A) to another dsl (B) create in xtext.
The code generation of A looks like
override void doGenerate(Resource resource, IFileSystemAccess2 fsa, IGeneratorContext context) {
    fsa.generateFile('transformed.wp', resource.allContents.filter(typeof(ActionSystem)).map [
        compile
    ].join(', '))
    val rs = new ResourceSetImpl();
    val r = rs.getResource(URI.createPlatformResourceURI('transformed.wp'), true);
    val List<EObject> contentOfYourFile = r.getContents();
    }
the error is then I call URI.createPlatformResourceURI('transformed.wp') the file cannot be found.
How do I access the file 'transformed.wp'.
The idea will be to copy part of the emf model of A to the model of B after the code was generated.
                        
The solution was in
IFileSystemAccess2