def modify_state_for_body(s, body):
            s.layers['segmentation'].segments = frozenset([body.segment_id])
            s.voxel_coordinates = body.bbox_start + body.bbox_size // 2
def rel(self, f):
        """Convert repo path back to path that is relative to cwd of matcher."""
        return util.pathto(self._root, self._cwd, f)