Missing Sort<T> method for Jagged matrices

gistfile1.txt

        /// <summary>
        ///   Sorts the columns of a matrix by sorting keys.
        /// </summary>
        /// 
        /// <param name="keys">The key value for each column.</param>
        /// <param name="values">The matrix to be sorted.</param>
        /// <param name="comparer">The comparer to use.</param>
        /// 
        public static TValue[][] Sort<TKey, TValue>(TKey[] keys, TValue[][] values, IComparer<TKey> comparer)
        {
            int[] indices = new int[keys.Length];
            for (int i = 0; i < keys.Length; i++)
                indices[i] = i;

            Array.Sort<TKey, int>(keys, indices, comparer);

            return values.Submatrix(0, values.Length - 1, indices);
        }