The annotation reference tests now show the date/time placeholder, but since localization is not active we don't see the actual date/time string. It would be nice to be able to have this in the reference images.
/**
   * For the reference tests, the full content of the various layers must be
   * visible. To achieve this, we load the common styles as used by the viewer
   * and extend them with a set of overrides to make all elements visible.
   *
   * Note that we cannot simply use `@import` to import the common styles in
   * the overrides file because the browser does not resolve that when the
   * styles are inserted via XHR. Therefore, we load and combine them here.
   */
  static get annotationStylePromise() {
    const styles = [VIEWER_CSS, "./annotation_layer_builder_overrides.css"];
    return shadow(this, "annotationStylePromise", loadStyles(styles));
  }
  static get textStylePromise() {
    const styles = ["./text_layer_test.css"];
    return shadow(this, "textStylePromise", loadStyles(styles));
  }
  static get xfaStylePromise() {
    const styles = [VIEWER_CSS, "./xfa_layer_builder_overrides.css"];
    return shadow(this, "xfaStylePromise", loadStyles(styles));
  }
  static createContainer(viewport) {