static void TreeCombination() {
// vynechan kd...
var cleaner =
new RemoveInvokeVisitor<
			Func<double, double, double, double>>(volume.Parameters);
var cleanVolume= cleaner.RemoveInvokeVisit(volume);
Console.WriteLine("Vyitn vpoet objemu = {0}", cleanVolume.ToString());
Console.WriteLine("Hodnota vyitnho vpotu objemu = {0}", cleanVolume.Compile()(20, 10, 8));
}
