syntax_data: {"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // However, that's non-trivial due to `()`.
context_before:     // FIXME: We should likely also do something about ZST return types, similar to above.
context_after:     // See <https://github.com/rust-lang/unsafe-code-guidelines/issues/552>.