{"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"ty::Ref(_ty_region,"}]}
            ty::Ref(_ty_region, ty_ref_type, _ty_mutability),
            hir::ExprKind::AddrOf(_borrow_kind, _borrow_mutability, borrowed_expr),
        ) = (&expr.kind, in_ty.kind())