annotations = classNode.getAnnotations(TestMixinTransformation.MY_TYPE);
if (annotations.size()>0) return; // bail out, another TestMixin transform already defines behavior
// no explicit class specified try by convention
String fileName = source.getName();
String className = GrailsResourceUtils.getClassName(new FileSystemResource(fileName));
if (className == null) {
return;
}
String targetClassName = null;