code: function wrap(elements, options) {
      elements = toArray(elements);
      /* Don't wrap only a container in a container */
      if (elements.length === 1 && isContainer(elements[0])) {
          return elements[0];
      }
      var container = {
          type: cardTypes.container,
          items: elements
      };
      setOptions(container, options);
      return container;
  }
docs: Wrap adaptive card elements in a container