/// <summary>
/// Looks for the first item or returns null if no items.
/// </summary>
/// <typeparam name="TEntity">Type of items.</typeparam>
/// <param name="query">Query for items.</param>
/// <param name="cancellation">Cancellation.</param>
/// <returns>Item.</returns>
public static async Task <TEntity> FirstOrDefaultAsync <TEntity>(
this IODataQueryable <TEntity> query,
CancellationToken cancellation = default)
{
var results = await query.Context.Provider.RetrieveItemsAsync(query.Take(1), cancellation);
return(results.Items.FirstOrDefault());
}
