List<RepaintBoundary> wrapAll(List<Widget> widgets)

Wraps each of the given children in RepaintBoundarys.

The key for each RepaintBoundary is derived either from the wrapped child's key (if the wrapped child has a non-null key) or from the wrapped child's index in the list.

Source 

static List<RepaintBoundary> wrapAll(List<Widget> widgets) {
  List<RepaintBoundary> result = new List<RepaintBoundary>(widgets.length);
  for (int i = 0; i < result.length; ++i)
    result[i] = new RepaintBoundary.wrap(widgets[i], i);
  return result;
}