{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"|(this,"}]}
            |(this, syntax_contexts, _, _), index, ctxt_data| {
            &mut (&mut *self, &mut syntax_contexts, &mut expn_data_table, &mut expn_hash_table),
                syntax_contexts.set_some(index, this.lazy(ctxt_data));