code: function createCarousel(content, count){
    var carouselElement = []
    carousel.attachment.payload.elements = content
  
    return carousel
  
  }
docs: createCarousel() lets you create a product carousel for
  Facebook Messenger.
  @param {Object} content - Carousel elements. It can include
  buttons, images and text.
  @return {Object} - Facebook Messenger expected JSON for carousel