{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"for"}]}
                for (&bits, block) in init_mask.blocks[start_block + 1..end_block_inclusive + 1]
                // and `BLOCK_SIZE` (the number of bits per block) will always be at least 8 (1 byte).
                    .iter()