{"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"self.at(&ObligationCause::dummy_with_span(span),"}]}
                    self.at(&ObligationCause::dummy_with_span(span), param_env)
                goals.extend(
                        .eq(DefineOpaqueTypes::Yes, hidden_ty, actual)?