verify_region
result = verify_region(&sil->sub_index, next_block, RL_KIND_INDEX, 0);
result = verify_region(&sil->volume, next_block, RL_KIND_VOLUME,
result = verify_region(&sil->saves[i].index_save, next_block,
result = verify_region(&layout->header, next_block++, RL_KIND_HEADER,
result = verify_region(&layout->config, next_block++, RL_KIND_CONFIG,
result = verify_region(&layout->seal, next_block + layout->super.volume_offset,
result = verify_region(&isl->header, next_block++, RL_KIND_HEADER,
result = verify_region(&isl->index_page_map, next_block, RL_KIND_INDEX_PAGE_MAP,
result = verify_region(&isl->volume_index_zones[z], next_block,
result = verify_region(&isl->open_chapter, next_block, RL_KIND_OPEN_CHAPTER,
result = verify_region(&isl->free_space, next_block, RL_KIND_EMPTY,