{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"self.register_obligations_for_call(&method_ty);"}]}
        self.register_obligations_for_call(&method_ty);
        let method_ty = method_ty.substitute(Interner, &substs);
        let ((formal_receiver_ty, param_tys), ret_ty, is_varargs) =