let hasFolder = 1;
  let hasCanonicalizer = 1;

  let builders = [
    OpBuilder<(ins "TypedAttr":$value),
    [{
      $_state.addAttribute("value", value);
      $_state.addTypes(value.getType());
    }]>
  ];

  let extraClassDeclaration = [{
    static bool isCompatibleReturnTypes(TypeRange l, TypeRange r);
  }];
}