{"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"(self.tcx.lang_items().async_fn_mut_trait(),"}]}
                (self.tcx.lang_items().async_fn_mut_trait(), sym::async_call_mut, true),
                (self.tcx.lang_items().async_fn_trait(), sym::async_call, true),
                (self.tcx.lang_items().async_fn_once_trait(), sym::async_call_once, false),