/// <summary>
/// Returns all siblings of PageData type of provided page.
/// </summary>
/// <param name="currentPage">Page for which to find siblings.</param>
/// <param name="excludeSelf">Mark if exclude itself from sibling sequence.</param>
/// <returns>Sequence of siblings of provided page.</returns>
public static IEnumerable <PageData> GetSiblings(this PageData currentPage, bool excludeSelf = true)
{
return(currentPage.GetSiblings <PageData>(excludeSelf));
}