public function widget( $args, $instance ) {
    static $first_instance = true;

    if ( ! isset( $args['widget_id'] ) ) {
      $args['widget_id'] = $this->id;
    }

    $output = '';

    $default_title = __( 'Recent Comments' );
    $title         = ( ! empty( $instance['title'] ) ) ? $instance['title'] : $default_title;

    
/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
    $title = apply_filters( 'widget_title', $title, $instance, $this->id_base );

    $number = ( ! empty( $instance['number'] ) ) ? absint( $instance['number'] ) : 5;
    if ( ! $number ) {
      $number = 5;
    }

    $comments = get_comments(
      
/**
 * Filters the arguments for the Recent Comments widget.
 *
 * @since 3.4.0
 * @since 4.9.0 Added the `$instance` parameter.
 *
 * @see WP_Comment_Query::query() for information on accepted arguments.
 *
 * @param array $comment_args An array of arguments used to retrieve the recent comments.
 * @param array $instance     Array of settings for the current widget.
 */
      apply_filters(
        'widget_comments_args',
        array(
          'number'      => $number,
          'status'      => 'approve',
          'post_status' => 'publish',
        ),
        $instance
      )
    );

    $output .= $args['before_widget'];
    if ( $title ) {
      $output .= $args['before_title'] . $title . $args['after_title'];
    }

    $recent_comments_id = ( $first_instance ) ? 'recentcomments' : "recentcomments-{$this->number}";
    $first_instance     = false;

    $format = current_theme_supports( 'html5', 'navigation-widgets' ) ? 'html5' : 'xhtml';

    
/** This filter is documented in wp-includes/widgets/class-wp-nav-menu-widget.php */
    $format = apply_filters( 'navigation_widgets_format', $format );

    if ( 'html5' === $format ) {
      // The title may be filtered: Strip out HTML and make sure the aria-label is never empty.
      $title      = trim( strip_tags( $title ) );
      $aria_label = $title ? $title : $default_title;
      $output    .= '<nav aria-label="' . esc_attr( $aria_label ) . '">';
    }

    $output .= '<ul id="' . esc_attr( $recent_comments_id ) . '">';
    if ( is_array( $comments ) && $comments ) {
      // Prime cache for associated posts. (Prime post term cache if we need it for permalinks.)
      $post_ids = array_unique( wp_list_pluck( $comments, 'comment_post_ID' ) );
      _prime_post_caches( $post_ids, strpos( get_option( 'permalink_structure' ), '%category%' ), false );

      foreach ( (array) $comments as $comment ) {
        $output .= '<li class="recentcomments">';
        $output .= sprintf(
          /* translators: Comments widget. 1: Comment author, 2: Post link. */
          _x( '%1$s on %2$s', 'widgets' ),
          '<span class="comment-author-link">' . get_comment_author_link( $comment ) . '</span>',
          '<a href="' . esc_url( get_comment_link( $comment ) ) . '">' . get_the_title( $comment->comment_post_ID ) . '</a>'
        );
        $output .= '</li>';
      }
    }
    $output .= '</ul>';

    if ( 'html5' === $format ) {
      $output .= '</nav>';
    }

    $output .= $args['after_widget'];

    echo $output;
  }