/**
*  @license
* Copyright 2021, JsData. All rights reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.

* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ==========================================================================
*/
/**
 * Takes a `tf` instance and adds the `Unique` kernel to
 * it in case it uses a `tensorflow` backend and the `Unique`
 * kernel is missing. This polyfill becomes unecessary as soon
 * as the `Unique` kernel is added to `tfjs-node`.
 *
 * @see {@link https://github.com/tensorflow/tfjs/pull/5956}
 * @see {@link https://github.com/tensorflow/tfjs/issues/4595}
 *
 * @param tf The TFJS instance to be polyfilled.
 */
export declare function polyfillUnique(tf: any): void;