def METHOD_NAME(self):
    self.provides(
        self.raw_key,
        ArraySpec(
            roi=Roi((20000, 2000, 2000), (2000, 200, 200)), voxel_size=(20, 2, 2)
        ),
    )
    self.provides(
        self.gt_labels_key,
        ArraySpec(
            roi=Roi((20100, 2010, 2010), (1800, 180, 180)), voxel_size=(20, 2, 2)
        ),
    )
    self.provides(
        self.gt_graph_key,
        GraphSpec(
            roi=Roi((None, None, None), (None, None, None)),
        ),
    )