public GeneratorBase createGenerator(GenDiagram diagram) {
   final GenEditorGenerator editorGen = diagram.getEditorGen();
   // using caching EmitterSource saves few seconds on test execution (115-118 compared to 112)
   // but it seems reasonable to avoid unpredictability of reuse (due to use of soft references)
   // and might be good idea to have separate test to test emitter reuse explicitly
   return new Generator(
       editorGen,
       new CodegenEmitters(
           !editorGen.isDynamicTemplates(),
           editorGen.getTemplateDirectory(),
           editorGen.getModelAccess() != null));
 }