{"ast_node_type":"variable","tokens":[{"end":79,"kind":"keyword","start":0,"text":"let"}]}
        let UseSpans::ClosureUse { args_span, .. } = use_spans else { return };
        // We only care about the case where a closure captured a binding.
        let Some(body_id) = tcx.hir_node(self.mir_hir_id()).body_id() else { return };