annotations = new HashSet<ActiveAnnotationGutter>();
editor.putUserData(KEY_IN_EDITOR, annotations);
}
final RevuAnnotationFieldGutter gutter = new RevuAnnotationFieldGutter(fileAnnotation, editor);
final AnnotationGutterLineConvertorProxy proxy =
new AnnotationGutterLineConvertorProxy(getUpToDateLineNumber, gutter);
editor.getGutter().registerTextAnnotation(proxy, proxy);
annotations.add(gutter);
}