/// <summary>
        ///      Creates a new CompositeIndicator such that the result will be the sum of the left and the constant
        /// </summary>
        /// <remarks>
        ///      value = left + constant
        /// </remarks>
        /// <param name="left">The left indicator</param>
        /// <param name="constant">The addend</param>
        /// <returns>The sum of the left and right indicators</returns>
        public static CompositeIndicator Plus(this IUpdatable left, double constant)
        {
            var constantIndicator = new ConstantIndicator(constant.ToString(CultureInfo.InvariantCulture), constant);

            return(left.Plus((IUpdatable)constantIndicator));
        }