syntax_data: {"ast_node_type":"other","tokens":[{"end":40,"kind":"keyword","start":0,"text":"tcx.lifetimes.re_erased,"}]}
source_snippet:                 tcx.lifetimes.re_erased,
context_before:             Rvalue::Ref(
context_after:                 BorrowKind::Mut { kind: MutBorrowKind::Default },