How to use the @deckdeckgo/deck-utils.getAttributesDefinition function in @deckdeckgo/deck-utils

}

      const filteredSlides: HTMLElement[] = await this.getDefinedFilteredSlides();

      const definedSlidesLength: number = filteredSlides ? filteredSlides.length : 0;

      // Are all slides loaded?
      if (loadedSlides.length !== definedSlidesLength) {
        resolve(null);
        return;
      }

      const orderedSlidesTagNames: DeckdeckgoSlideDefinition[] = [];

      for (const slide of Array.from(loadedSlides)) {
        const attributes: DeckdeckgoAttributeDefinition[] = await getAttributesDefinition(slide.attributes);

        orderedSlidesTagNames.push({
          template: slide.tagName ? slide.tagName.toLowerCase() : undefined,
          content: slide.innerHTML,
          attributes: attributes
        });
      }

      const attributes: DeckdeckgoAttributeDefinition[] = await getAttributesDefinition(this.el.attributes);
      const background: HTMLElement = this.el.querySelector(':scope > [slot=\'background\']');

      const deck: DeckdeckgoDeckDefinition = {
        slides: orderedSlidesTagNames,
        attributes: attributes,
        background: background ? background.innerHTML : null,
        reveal: this.reveal,