{"ast_node_type":"variable","tokens":[{"end":89,"kind":"keyword","start":0,"text":"let"}]}
        let hir::Node::Expr(parent) = tcx.parent_hir_node(index1.hir_id) else { return };
        let Some(index1) = self.find_expr(span) else { return };
        let hir::ExprKind::Index(_, idx1, _) = parent.kind else { return };