{"ast_node_type":"variable","tokens":[{"end":68,"kind":"keyword","start":0,"text":"if"}]}
    if let ty::Ref(_, inner_ty, Mutability::Not) = start_ty.kind() {
    let start_ty = cx.typeck_results().node_type(e.hir_id);
        // If an UnsafeCell method is involved, we need to additionally check the