using System;
using System.Collections.Generic;
using System.Text;

namespace CategoryTheory
{
    /// <summary>
    /// Natural transformation
    /// </summary>
    public interface INaturalTransformation : ICategoryArrow
    {

        /// <summary>
        /// Calculates arrow of natural transform
        /// </summary>
        /// <param name="obj">Object</param>
        /// <returns>The arrow of transform</returns>
        ICategoryArrow CalculateArrow(ICategoryObject obj);

        /// <summary>
        /// Calculates arrow of natural thansform
        /// </summary>
        /// <param name="obj">The object</param>
        /// <param name="source">Source</param>
        /// <param name="target">Tatget</param>
        /// <returns>The arrow</returns>
        ICategoryArrow CalculateArrow(ICategoryObject obj,
            ICategoryObject source, ICategoryObject target);

    }
}
