{"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"//"}]}
// this type only takes up 4 bytes, at the cost of being restricted to a
// Equivalent to `Option<usize>`. That type takes up 16 bytes on 64-bit, but
// maximum value of `u32::MAX - 1`. In practice, this is more than enough.