/// <summary>
/// Whether the grouping of candles by the specified attribute is registered.
/// </summary>
/// <typeparam name="TCandle">The candles type.</typeparam>
/// <param name="manager">The candles manager.</param>
/// <param name="security">The instrument for which the grouping is registered.</param>
/// <param name="arg">Candle arg.</param>
/// <returns><see langword="true" /> if registered. Otherwise, <see langword="false" />.</returns>
public static bool IsCandlesRegistered <TCandle>(this ICandleManager manager, Security security, object arg)
where TCandle : Candle
{
return(manager.GetSeries <TCandle>(security, arg) != null);
}
