public function get_items( $request ) {
    $parent = $this->get_parent( $request['parent'] );

    if ( is_wp_error( $parent ) ) {
      return $parent;
    }

    $global_styles_config = $this->get_decoded_global_styles_json( $parent->post_content );

    if ( is_wp_error( $global_styles_config ) ) {
      return $global_styles_config;
    }

    if ( wp_revisions_enabled( $parent ) ) {
      $registered = $this->get_collection_params();
      $query_args = array(
        'post_parent'    => $parent->ID,
        'post_type'      => 'revision',
        'post_status'    => 'inherit',
        'posts_per_page' => -1,
        'orderby'        => 'date ID',
        'order'          => 'DESC',
      );

      $parameter_mappings = array(
        'offset'   => 'offset',
        'page'     => 'paged',
        'per_page' => 'posts_per_page',
      );

      foreach ( $parameter_mappings as $api_param => $wp_param ) {
        if ( isset( $registered[ $api_param ], $request[ $api_param ] ) ) {
          $query_args[ $wp_param ] = $request[ $api_param ];
        }
      }

      $revisions_query = new WP_Query();
      $revisions       = $revisions_query->query( $query_args );
      $offset          = isset( $query_args['offset'] ) ? (int) $query_args['offset'] : 0;
      $page            = (int) $query_args['paged'];
      $total_revisions = $revisions_query->found_posts;

      if ( $total_revisions < 1 ) {
        // Out-of-bounds, run the query again without LIMIT for total count.
        unset( $query_args['paged'], $query_args['offset'] );
        $count_query = new WP_Query();
        $count_query->query( $query_args );

        $total_revisions = $count_query->found_posts;
      }

      if ( $revisions_query->query_vars['posts_per_page'] > 0 ) {
        $max_pages = ceil( $total_revisions / (int) $revisions_query->query_vars['posts_per_page'] );
      } else {
        $max_pages = $total_revisions > 0 ? 1 : 0;
      }
      if ( $total_revisions > 0 ) {
        if ( $offset >= $total_revisions ) {
          return new WP_Error(
            'rest_revision_invalid_offset_number',
            __( 'The offset number requested is larger than or equal to the number of available revisions.' ),
            array( 'status' => 400 )
          );
        } elseif ( ! $offset && $page > $max_pages ) {
          return new WP_Error(
            'rest_revision_invalid_page_number',
            __( 'The page number requested is larger than the number of pages available.' ),
            array( 'status' => 400 )
          );
        }
      }
    } else {
      $revisions       = array();
      $total_revisions = 0;
      $max_pages       = 0;
      $page            = (int) $request['page'];
    }

    $response = array();

    foreach ( $revisions as $revision ) {
      $data       = $this->prepare_item_for_response( $revision, $request );
      $response[] = $this->prepare_response_for_collection( $data );
    }

    $response = rest_ensure_response( $response );

    $response->header( 'X-WP-Total', (int) $total_revisions );
    $response->header( 'X-WP-TotalPages', (int) $max_pages );

    $request_params = $request->get_query_params();
    $base_path      = rest_url( sprintf( '%s/%s/%d/%s', $this->namespace, $this->parent_base, $request['parent'], $this->rest_base ) );
    $base           = add_query_arg( urlencode_deep( $request_params ), $base_path );

    if ( $page > 1 ) {
      $prev_page = $page - 1;

      if ( $prev_page > $max_pages ) {
        $prev_page = $max_pages;
      }