def METHOD_NAME(self):
    self.provides(
        ArrayKeys.GT_LABELS,
        ArraySpec(
            roi=Roi((-40, -40, -40), (160, 160, 160)),
            voxel_size=(20, 4, 8),
            interpolatable=False,
        ),
    )
    self.provides(
        ArrayKeys.GT_MASK,
        ArraySpec(
            roi=Roi((-40, -40, -40), (160, 160, 160)),
            voxel_size=(20, 4, 8),
            interpolatable=False,
        ),
    )