text: /**
   * @license
   * Copyright 2016 Google Inc.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  
  /**
   * @template A
   */
  class MDCFoundation {
    /** @return enum{cssClasses} */
    static get cssClasses() {
      // Classes extending MDCFoundation should implement this method to return an object which exports every
      // CSS class the foundation class needs as a property. e.g. {ACTIVE: 'mdc-component--active'}
      return {};
    }
  
    /** @return enum{strings} */
    static get strings() {
      // Classes extending MDCFoundation should implement this method to return an object which exports all
      // semantic strings as constants. e.g. {ARIA_ROLE: 'tablist'}
      return {};
    }
  
    /** @return enum{numbers} */
    static get numbers() {
      // Classes extending MDCFoundation should implement this method to return an object which exports all
      // of its semantic numbers as constants. e.g. {ANIMATION_DELAY_MS: 350}
      return {};
    }
  
    /** @return {!Object} */
    static get defaultAdapter() {
      // Classes extending MDCFoundation may choose to implement this getter in order to provide a convenient
      // way of viewing the necessary methods of an adapter. In the future, this could also be used for adapter
      // validation.
      return {};
    }
  
    /**
     * @param {A=} adapter
     */
    constructor(adapter = {}) {
      /** @protected {!A} */
      this.adapter_ = adapter;
    }
  
    init() {
      // Subclasses should override this method to perform initialization routines (registering events, etc.)
    }
  
    destroy() {
      // Subclasses should override this method to perform de-initialization routines (de-registering events, etc.)
    }
  }
  
  export default MDCFoundation;
  