syntax_data: {"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // potentially self-referential types (see
context_before:             // <https://github.com/rust-lang/rust/pull/98017>), and for mutable references to
context_after:             // <https://github.com/rust-lang/unsafe-code-guidelines/issues/381>). If LLVM had a way