{"ast_node_type":"variable","tokens":[{"end":65,"kind":"keyword","start":0,"text":"let"}]}
        let parent = fcx.tcx.parent_hir_node(block_or_return_id);
        let due_to_block = matches!(fcx.tcx.hir_node(block_or_return_id), hir::Node::Block(..));
        if let Some(expr) = expression