{"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"hir::ExprKind::Let(self.arena.alloc(hir::LetExpr"}]}
                    hir::ExprKind::Let(self.arena.alloc(hir::LetExpr {
                ExprKind::Let(pat, scrutinee, span, recovered) => {
                        span: self.lower_span(*span),