public static IEnumerable <BlockViewOnAsyncLongOperationMessageObserver> BuildObservers(ViewGroup fromViewGroup)
{
var viewsToBlock = new List <View>();
fromViewGroup.ForEachView <View>(view =>
{
viewsToBlock.Add(view);
});
return
(viewsToBlock.Select(
view => new BlockViewOnAsyncLongOperationMessageObserver(new WeakReference <View>(view))));
}