/// <summary>
/// Move a item into a new position relative to the current position in the <see cref="IPagedDataSet{TItem, TResult}"/>
/// </summary>
/// <param name="dataSet">the dataset to move item</param>
/// <param name="item">The item to move</param>
/// <param name="offset">a new position relative to the current item position</param>
/// <returns></returns>
public static async Task MoveOffset <TItem, TResult>(this Movable <TItem, TResult> movable, TItem item, int offset) where TItem : class
=> await movable.MoveOffset(movable.PagedDataSet, item, offset);