Response with next link signifying continuation.
        /// <summary>
        /// Applies the action on each value in the paginated response.
        /// </summary>
        /// <typeparam name="TType">The type of the response.</typeparam>
        /// <param name="getFirstPage">The function that returns the first page.</param>
        /// <param name="getNextPage">The function that returns subsequent pages.</param>
        /// <param name="cancellationToken">The cancellation token.</param>
        public static TType[] Enumerate <TType>(
            Func <Task <ResponseWithContinuation <TType[]> > > getFirstPage,
            Func <string, Task <ResponseWithContinuation <TType[]> > > getNextPage,
            CancellationToken?cancellationToken)
        {
            var result = new List <TType>();
            ResponseWithContinuation <TType[]> batch = null;

            while ((cancellationToken.HasValue && !cancellationToken.Value.IsCancellationRequested) && (batch == null || !string.IsNullOrWhiteSpace(batch.NextLink)))
            {
                cancellationToken.Value.ThrowIfCancellationRequested();

                batch = batch == null
                    ? getFirstPage().Result
                    : getNextPage(batch.NextLink).Result;

                if (batch == null)
                {
                    return(result.ToArray());
                }

                result.AddRange(batch.Value.Coalesce());
            }

            return(result.ToArray());
        }
        /// <summary>
        /// Applies the action on each value in the paginated response.
        /// </summary>
        /// <typeparam name="TType">The type of the response.</typeparam>
        /// <param name="getFirstPage">The function that returns the first page.</param>
        /// <param name="getNextPage">The function that returns subsequent pages.</param>
        /// <param name="action">The action to apply.</param>
        /// <param name="cancellationToken">The cancellation token.</param>
        public static void ForEach <TType>(
            Func <Task <ResponseWithContinuation <TType[]> > > getFirstPage,
            Func <string, Task <ResponseWithContinuation <TType[]> > > getNextPage,
            CancellationToken?cancellationToken,
            Action <TType[]> action)
        {
            ResponseWithContinuation <TType[]> batch = null;

            while ((cancellationToken.HasValue && !cancellationToken.Value.IsCancellationRequested) && (batch == null || !string.IsNullOrWhiteSpace(batch.NextLink)))
            {
                cancellationToken.Value.ThrowIfCancellationRequested();

                batch = batch == null
                    ? getFirstPage().Result
                    : getNextPage(batch.NextLink).Result;

                if (batch == null)
                {
                    return;
                }

                action(batch.Value);
            }
        }