{"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"for"}]}
        for (i, ity) in tys.into_iter().enumerate() {
        // For an iterator of length n, create 2*n + 1 blocks.
            // Each iteration creates two blocks, referred to here as block 2*i and block 2*i + 1.