public static Task <bool> MovePrevAsync <T>(this IDataCursor <T> cursor)
{
if (cursor is null)
{
throw new ArgumentNullException(nameof(cursor));
}
return(cursor.MoveAsync(cursor.CurrentIndex - 1));
}
public static Task <bool> MoveFirstAsync <T>(this IDataCursor <T> cursor)
{
if (cursor is null)
{
throw new ArgumentNullException(nameof(cursor));
}
return(cursor.MoveAsync(0));
}