syntax_data: {"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"ExprKind::Borrow"}]}
source_snippet:             ExprKind::Borrow { borrow_kind, arg } => {
context_before:             }
context_after:                 let mut visitor = LayoutConstrainedPlaceVisitor::new(self.thir, self.tcx);