def METHOD_NAME():
    packed_inputs = demo_mm_inputs()['data_samples']
    batch_gt_instances, batch_gt_instances_ignore, batch_img_metas \
        = unpack_gt_instances(packed_inputs)
    assert len(batch_gt_instances) == len(packed_inputs)
    assert len(batch_gt_instances_ignore) == len(packed_inputs)
    assert len(batch_img_metas) == len(packed_inputs)