syntax_data: {"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // <https://github.com/rust-lang/rust/pull/98017>), and for mutable references to
context_before:             // they can be deallocated at any time. Same for non-frozen shared references (see
context_after:             // potentially self-referential types (see