@Override
  public synchronized void init(ProcessingEnvironment processingEnv) {
    super.init(processingEnv);
    errorReporter = new ErrorReporter(processingEnv);
    annotationType = elementUtils().getTypeElement(annotationClassName);
    if (annotationType != null) {
      simpleAnnotationName = annotationType.getSimpleName().toString();
    }
  }
The simple name of {@link #annotationType}.
value/src/main/java/com/google/auto/value/processor/AutoValueishProcessor.java