text: // Copyright 2017 The Kubernetes Dashboard Authors.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // 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.
  
  // As this is abstract class then we have to allow unused variables in methods
  /*eslint no-unused-vars: 0*/
  
  /**
   * Abstract class representing Validator.
   *
   * @class
   */
  export class Validator {
    constructor() {
      if (this.constructor === Validator) {
        throw new TypeError('Abstract class "Validator" cannot be instantiated directly.');
      }
    }
  
    /**
     * Should be implemented to return true when the given value meets the requirements
     * of the expected Type or given value is undefined|empty in order to not conflict with
     * other check such as 'required', false otherwise.
     *
     * @param {*} value
     * @return {boolean}
     */
    isValid(value) {}
  }
  