text: // @flow
  
  import { Component } from 'react';
  
  /**
   * Abstract component that defines a refreshable page to be rendered by
   * {@code PagedList}.
   */
  export default class AbstractPage<P> extends Component<P> {
      /**
       * Method to be overriden by the implementing classes to refresh the data
       * content of the component.
       *
       * Note: It is a static method as the {@code Component} may not be
       * initialized yet when the UI invokes refresh (e.g. tab change).
       *
       * @returns {void}
       */
      static refresh() {
          // No implementation in abstract class.
      }
  }
  