{"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"//"}]}
        // would do the same for us here.
        // `UnsafeCell` blocks niches for the same reason, but we don't yet have `UnsafePinned` that
        // See <https://github.com/rust-lang/rust/issues/63818>, <https://github.com/rust-lang/miri/issues/3780>.