Getting Folder from folder RelativeID - Windows Phone

Question

How can I get folder from folder relative ID in Windows Phone 8.1?

StorageFolder folder = await StorageFolder.GetFolderFromPathAsync(path);

this code works with full path, not relativeID.

Answer 1

public sealed class StorageFolder
{
    IAsyncOperation<StorageFolder> GetFolderAsync(string name);

. . .

StorageFolder folder = await StorageFolder.GetFolderAsync(folderId);