def METHOD_NAME(image_extent: Box,
                            label_source: 'ObjectDetectionLabelSource',
                            label_buffer: int) -> List[Box]:
    pos_windows = []
    boxes = label_source.get_labels().get_boxes()
    for box in boxes:
        window = box.buffer(label_buffer, image_extent)
        pos_windows.append(window)
    return pos_windows