/// <summary>
/// Creates a new <see cref="CommutativeBinaryFunction" /> with the given programs as parameters.
/// </summary>
/// <param name="firstProgram">The first parameter of the program.</param>
/// <param name="secondProgram">The second parameter of the program.</param>
protected CommutativeBinaryFunction(ITreeProgram <double> firstProgram, ITreeProgram <double> secondProgram) :
base(firstProgram.CompareTo(secondProgram) >= 0 ? firstProgram : secondProgram,
firstProgram.CompareTo(secondProgram) >= 0 ? secondProgram : firstProgram)
{
}