/// <summary>トリミング</summary>
        public static Field Trimming2D(Field x, int trim)
        {
            Field y    = new Field();
            Link  link = new Links.Connection2D.Trimming(x, y, trim);

            link.Forward();

            return(y);
        }
        /// <summary>トリミング</summary>
        public static Field Trimming2D(Field x, int trim_left, int trim_right, int trim_top, int trim_bottom)
        {
            Field y    = new Field();
            Link  link = new Links.Connection2D.Trimming(x, y, trim_left, trim_right, trim_top, trim_bottom);

            link.Forward();

            return(y);
        }