syntax_data: {"ast_node_type":"variable","tokens":[{"end":43,"kind":"keyword","start":0,"text":"&&"}]}
source_snippet:             && let ty::Alias(_, alias_ty) =
context_before:                 self.tcx().opt_rpitit_info(def_id)
context_after:                 self.tcx().fn_sig(fn_def_id).skip_binder().output().skip_binder().kind()