Where model would be a flow or global map containing keys and values.
Example
def model = [ myTitle: "This is a flexable modal", mySubtitle: "My SubTitle", myBody: "This is the body HTML...", myOtherBitOfText: "This is more HTML... This is more <b>HTML...</b> This is more HTML... This is more HTML... ", myImage1: "https://cdn.pixabay.com/photo/2018/08/03/14/00/vw-beetle-3581950__340.jpg", myImage2: "https://cdn.pixabay.com/photo/2018/03/08/21/51/lake-3209994__340.jpg", myImageCarousel: ["https://cdn.pixabay.com/photo/2017/08/03/11/28/ferris-wheel-2575709__340.jpg", "https://cdn.pixabay.com/photo/2016/11/23/15/54/architecture-1853687__340.jpg"],
myYouTube: "https://www.youtube.com/watch?v=rayiRwxUGdk", myAudio: "https://www.mfiles.co.uk/mp3-downloads/chopin-nocturne-op9-no2.mp3"]
A template variable (flow or global) then needs to be define:
the presentation order of the items found in the model
{"name" : "displayModal","items" : [ {"type":"title","value":"This is a flexable modal" }, {"type":"audio","value":"https://www.mfiles.co.uk/mp3-downloads/chopin-nocturne-op9-no2.mp3" }, {"type":"subtitle","value":"My SubTitle" }, {"type":"image","value":"https://cdn.pixabay.com/photo/2018/08/03/14/00/vw-beetle-3581950__340.jpg" }, {"type":"html","value":"This is the body HTML..." }, {"type":"carousel","value": ["https://cdn.pixabay.com/photo/2017/08/03/11/28/ferris-wheel-2575709__340.jpg","https://cdn.pixabay.com/photo/2016/11/23/15/54/architecture-1853687__340.jpg" ] }, {"type":"html","value":"This is more HTML... This is more <b>HTML...</b> This is more HTML... This is more HTML... " }, {"type":"youTube","value":"https://www.youtube.com/watch?v=rayiRwxUGdk" }, {"type":"image","value":"https://cdn.pixabay.com/photo/2018/03/08/21/51/lake-3209994__340.jpg" } ]}