drawRender(svgPath) {
    if (!DebugDrawer.config.render) {
      return;
    }
    svgPath.setAttribute(
      'filter',
      'url(#' + this.constants_.debugFilterId + ')',
    );
    setTimeout(function () {
      svgPath.setAttribute('filter', '');
    }, 100);
  }
Show a debug filter to highlight that a block has been rendered.
@param {!SVGElement} svgPath The block's svg path.
@protected