code: def register_layouts(layouts, app, url="/api/props/", brand="Pyxley"):
      
      def props(name):
          if name not in layouts:
              # cast as list for python3
              name = list(layouts.keys())[0]
          return jsonify({"layouts": layouts[name]["layout"]})
  
      def apps():
          paths = []
          for i, k in enumerate(layouts.keys()):
              if i == 0:
                  paths.append({
                      "path": "/",
                      "label": layouts[k].get("title", k)
                  })
  
              paths.append({
                  "path": "/"+k,
                  "label": layouts[k].get("title", k)
              })
  
          return jsonify({"brand": brand, "navlinks": paths})
  
      app.add_url_rule(url+"<string:name>/", view_func=props)
      app.add_url_rule(url, view_func=apps)
docs: register UILayout with the flask app
  
          create a function that will send props for each UILayout
  
          Args:
              layouts (dict): dict of UILayout objects by name
              app (object): flask app
              url (string): address of props; default is /api/props/