syntax_data: {"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"fake_borrow_temps:"}]}
source_snippet:         fake_borrow_temps: &[(Place<'tcx>, Local, FakeBorrowKind)],
context_before:         branch: MatchTreeBranch<'tcx>,
context_after:         scrutinee_span: Span,