/// <summary>The restore sprited images from cache.</summary>
        /// <param name="mapXmlFile">The map xml file.</param>
        /// <param name="cacheSection">The cache section.</param>
        /// <param name="results">The results.</param>
        /// <param name="destinationDirectory">The destination Directory.</param>
        /// <param name="imageAssembleScanDestinationFile">The image Assemble Scan Destination File.</param>
        /// <returns>The <see cref="bool"/>.</returns>
        private static ImageLog RestoreSpritedImagesFromCache(string mapXmlFile, ICacheSection cacheSection, BlockingCollection <ContentItem> results, string destinationDirectory, string imageAssembleScanDestinationFile)
        {
            // restore log file, is required by next step in applying sprites to the css.
            var spriteLogFileContentItem = cacheSection.GetCachedContentItems(CacheFileCategories.SpriteLogFile).FirstOrDefault();

            if (spriteLogFileContentItem == null)
            {
                return(null);
            }

            if (!string.IsNullOrWhiteSpace(imageAssembleScanDestinationFile))
            {
                var spriteLogFileXmlContentItem = cacheSection.GetCachedContentItems(CacheFileCategories.SpriteLogFileXml).FirstOrDefault();
                if (spriteLogFileXmlContentItem != null)
                {
                    spriteLogFileXmlContentItem.WriteTo(mapXmlFile);
                }
            }

            var imageLog = spriteLogFileContentItem.Content.FromJson <ImageLog>(true);

            // Restore images
            var spritedImageContentItems = cacheSection.GetCachedContentItems(CacheFileCategories.HashedSpriteImage);

            spritedImageContentItems.ForEach(sici => sici.WriteToContentPath(destinationDirectory));
            results.AddRange(spritedImageContentItems);

            return(imageLog);
        }
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        /// <summary>The restore bundle from cache.</summary>
        /// <param name="cacheSection">The cache section.</param>
        /// <returns>The <see cref="bool"/>.</returns>
        private bool RestoreBundleFromCache(ICacheSection cacheSection)
        {
            var endResults = cacheSection.GetCachedContentItems(CacheFileCategories.AssemblerResult, true);

            endResults.ForEach(er => er.WriteToContentPath(this.context.Configuration.DestinationDirectory));
            return(true);
        }